{"id":11604,"date":"2023-05-05T09:25:42","date_gmt":"2023-05-05T01:25:42","guid":{"rendered":"https:\/\/www.gbase8.cn\/?p=11604"},"modified":"2023-05-05T09:25:43","modified_gmt":"2023-05-05T01:25:43","slug":"gbase-8a%e6%97%a5%e6%9c%9f%e5%87%bd%e6%95%b0date_part%e5%92%8cextract%e7%9a%84%e4%bb%8b%e7%bb%8d%e5%92%8c%e4%bd%bf%e7%94%a8%e6%a0%b7%e4%be%8b","status":"publish","type":"post","link":"https:\/\/www.gbase8.cn\/en\/11604","title":{"rendered":"\u5357\u5927\u901a\u7528GBase 8a\u65e5\u671f\u51fd\u6570date_part\u548cextract\u7684\u4ecb\u7ecd\u548c\u4f7f\u7528\u6837\u4f8b"},"content":{"rendered":"<p>GBase 8a\u63d0\u4f9b\u4e86date_part\u6765\u63d0\u53d6\u65e5\u671f\u7684\u90e8\u5206\u5c5e\u6027\uff0c\u540c\u65f6\u63d0\u4f9b\u4e86\u4e0eoracle\u517c\u5bb9\u7684extract\u51fd\u6570\u3002\u672c\u6587\u4ecb\u7ecd\u8fd92\u4e2a\u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Directory Navigation<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a2b49cf31949\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a2b49cf31949\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#%E5%8F%82%E8%80%83\" >\u53c2\u8003<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#%E8%AF%AD%E6%B3%95\" >\u8bed\u6cd5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#year\" >year<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#year_month\" >year_month<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#quarter\" >quarter<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#month\" >month<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#week\" >week<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#day\" >day<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#day_hour\" >day_hour<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#day_minute\" >day_minute<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#day_second\" >day_second<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#hour\" >hour<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#hour_minute\" >hour_minute<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#hour_second\" >hour_second<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#minute\" >minute<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#minute_second\" >minute_second<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#second\" >second<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#millisecond\" >millisecond<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#microsecond\" >microsecond<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#day_microsecond\" >day_microsecond<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#hour_microsecond\" >hour_microsecond<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#minute_microsecond\" >minute_microsecond<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#second_microsecond\" >second_microsecond<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#century\" >century<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#decade\" >decade<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#dow\" >dow<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#doy\" >doy<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#epoch\" >epoch<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#isodow\" >isodow<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#isoyear\" >isoyear<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#millennium\" >millennium<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#milliseconds\" >milliseconds<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/www.gbase8.cn\/en\/11604\/#microseconds\" >microseconds<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%8F%82%E8%80%83\"><\/span>\u53c2\u8003<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><a href=\"https:\/\/www.gbase8.cn\/en\/11465\/\">GBase 8a\u65e5\u671f\u622a\u65ad\u51fd\u6570date_trunc\u4f7f\u7528\u6837\u4f8b<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%AF%AD%E6%B3%95\"><\/span>\u8bed\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>date_part(type,date)\nextract(type from date)<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>type \u63d0\u53d6\u7684\u4f4d\u7f6e\u3002\u5176\u4e2dmilliseconds<strong><span class=\"has-inline-color has-luminous-vivid-orange-color\">\u8fd4\u56de\u7ed3\u679c\u4e3adecimal,\u5176\u5b83\u7684\u4e3abigint(12)<\/span><\/strong>\u3002<\/li><li>date \u65e5\u671f\uff0c\u4e00\u822c\u662fdatetime\u7c7b\u578b\u3002\u5982\u679c\u662fdate\u7c7b\u578b\u4f1a\u81ea\u52a8\u8f6c\u6210datetime<\/li><\/ul>\n\n\n\n<p>\u5176\u4e2dtype\u7c7b\u578b\uff0cdate_part\u540c\u65f6\u652f\u6301\u4e0d\u5e26\u5f15\u53f7\u548c\u5e26\u5f15\u53f7\u4e24\u79cd\u5199\u6cd5\uff0c\u6bd4\u5982  year\u548c'year'\u3002<\/p>\n\n\n\n<p><strong><span class=\"has-inline-color has-luminous-vivid-orange-color\">\u6ce8\u610f<\/span><\/strong>epoch\u5728date_part\u4e0d\u652f\u6301\uff0c\u4ec5extract\u652f\u6301\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Type\u7c7b\u578b<\/th><th>\u8bf4\u660e<\/th><th>date_part\/extract<\/th><th>date_trunc<\/th><\/tr><\/thead><tbody><tr><td>year<\/td><td>\u5e74<\/td><td>\u65e5\u671f\u4e2d\u7684\u5e74\u7684\u90e8\u5206\u3002\u8bf7\u6ce8\u610f\u533a\u5206isoyear\u3002<\/td><td>\u5e74\u4ee5\u4e0b\u7684\u8bbe\u7f6e\u4e3a01-01 00:00:00<\/td><\/tr><tr><td>year_month<\/td><td>\u5e74\u6708<\/td><td>\u8fd4\u56de\u5e74\u548c\u6708<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>quarter<\/td><td>\u5b63\u5ea6<\/td><td>\u8fd4\u56de\u5c5e\u4e8e\u7b2c\u51e0\u4e2a\u5b63\u5ea6\u3002<br>1\uff1a01-01 - 03-31<br>2\uff1a04-01 - 06-30<br>3\uff1a07-01 - 09-30<br>4\uff1a10-01 - 12-31<\/td><td>\u65e5\u671f\u6240\u5728\u5b63\u5ea6\u7684\u7b2c\u4e00\u5929\uff0c\u65f6\u95f4\u90e8\u5206\u4e3a00:00:00<\/td><\/tr><tr><td>month<\/td><td>\u6708<\/td><td>\u65e5\u671f\u4e2d\u7684\u6708\u4efd<\/td><td>\u65e5\u671f\u6240\u5728\u6708\u7684\u7b2c\u4e00\u5929\uff0c\u65f6\u95f4\u90e8\u5206\u4e3a00:00:00<\/td><\/tr><tr><td>week<\/td><td>\u5468<\/td><td>\u65e5\u671f\u6240\u5728\u5f53\u5e74\u7684\u7b2c\u51e0\u5468<\/td><td>\u65e5\u671f\u6240\u5728\u5468\u7684\u5468\u4e00\uff0c\u65f6\u95f4\u90e8\u5206\u4e3a00:00:00<\/td><\/tr><tr><td>day<\/td><td>\u65e5<\/td><td>\u65e5\u671f\u4e2d\u7684\u65e5<\/td><td>\u65e5\u671f\u7684\u65f6\u95f4\u90e8\u5206\u8bbe\u7f6e\u4e3a00:00:00<\/td><\/tr><tr><td>day_hour<\/td><td>\u65e5\uff0c\u5c0f\u65f6<\/td><td>\u65e5\u671f\u4e2d\u7684\u65e5\u548c\u5c0f\u65f6<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>day_minute<\/td><td>\u65e5\u3001\u5c0f\u65f6\u3001\u5206<\/td><td>\u65e5\u671f\u4e2d\u7684\u65e5\u3001\u5c0f\u65f6\u548c\u5206<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>day_second<\/td><td>\u65e5\u3001\u5c0f\u65f6\u3001\u5206\u3001\u79d2<\/td><td>\u65e5\u671f\u4e2d\u7684\u65e5\u3001\u5c0f\u65f6\u3001\u5206\u548c\u79d2<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>hour<\/td><td>\u5c0f\u65f6<\/td><td>\u65e5\u671f\u4e2d\u7684\u5c0f\u65f6\u90e8\u5206<\/td><td>\u5c0f\u65f6\u4ee5\u4e0b\u8bbe\u7f6e\u4e3a00:00<\/td><\/tr><tr><td>hour_minute<\/td><td>\u5c0f\u65f6\u3001\u5206\u949f<\/td><td>\u65e5\u671f\u4e2d\u7684\u5c0f\u65f6\u3001\u5206\u949f\u90e8\u5206<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>hour_second<\/td><td>\u5c0f\u65f6\u3001\u5206\u3001\u79d2<\/td><td>\u65e5\u671f\u4e2d\u7684\u5c0f\u65f6\u3001\u5206\u79cd\u3001\u8868\u90e8\u5206<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>minute<\/td><td>\u5206\u949f<\/td><td>\u65e5\u671f\u4e2d\u7684\u5206\u949f\u90e8\u5206<\/td><td>\u5206\u949f\u4ee5\u4e0b\u7684\u8bbe\u7f6e\u4e3a0<\/td><\/tr><tr><td>minute_second<\/td><td>\u5206\u949f\u3001\u79d2<\/td><td>\u65e5\u671f\u4e2d\u7684\u5206\u3001\u79d2\u90e8\u5206<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>second<\/td><td>\u79d2<\/td><td>\u65e5\u671f\u4e2d\u7684\u79d2<\/td><td>\u79d2\u4ee5\u4e0b\u8bbe\u7f6e\u4e3a0<\/td><\/tr><tr><td>millisecond<\/td><td>\u6beb\u79d2<\/td><td>\u65e5\u671f\u4e2d\u7684\u6beb\u79d2\u90e8\u5206<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>microsecond<\/td><td>\u5fae\u79d2<\/td><td>\u65e5\u671f\u4e2d\u7684\u5fae\u79d2\u90e8\u5206<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>day_microsecond<\/td><td>\u5929\u3001\u5c0f\u65f6\u3001\u5206\u3001\u79d2\u3001\u5fae\u79d2<\/td><td>\u65e5\u671f\u4e2d\u7684\u5929\u3001\u5c0f\u65f6\u3001\u5206\u3001\u79d2\u3001\u5fae\u79d2\u90e8\u5206\u3002<br>\u6ce8\u610f\u683c\u5f0f\u4e3addhhmmssXXXXXX<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>hour_microsecond<\/td><td>\u5c0f\u65f6\u3001\u5206\u3001\u79d2\u3001\u5fae\u79d2<\/td><td>\u65e5\u671f\u4e2d\u7684\u5c0f\u65f6\u3001\u5206\u3001\u79d2\u3001\u5fae\u79d2\u90e8\u5206\u3002<br>\u6ce8\u610f\u683c\u5f0f\u4e3ahhmmssXXXXXX<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>minute_microsecond<\/td><td>\u5206\u3001\u79d2\u3001\u5fae\u79d2<\/td><td>\u65e5\u671f\u4e2d\u7684\u5206\u3001\u79d2\u3001\u5fae\u79d2\u90e8\u5206\u3002<br>\u6ce8\u610f\u683c\u5f0f\u4e3ammssXXXXXX<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>second_microsecond<\/td><td>\u79d2\u3001\u5fae\u79d2<\/td><td>\u65e5\u671f\u4e2d\u7684\u79d2\u3001\u5fae\u79d2\u90e8\u5206\u3002<br>\u6ce8\u610f\u683c\u5f0f\u4e3assXXXXXX<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>Century<\/td><td>\u4e16\u7eaa<\/td><td>\u8be5\u65e5\u671f\u6240\u5728\u7684\u4e16\u7eaa\u3002\u4ee5\u767e\u5e74\u4e3a\u5355\u4f4d\uff0c\u6574\u767e\u5e74\u4e3a\u4e0a\u4e00\u4e16\u7eaa\u3002<br>0001-0100 \u7b2c1\u4e16\u7eaa<br>0101-2000 \u7b2c2\u4e16\u7eaa<br>...<br>2021-2100 \u7b2c21\u4e16\u7eaa<\/td><td>\u8be5\u65e5\u671f\u6240\u5728\u4e16\u7eaa\u7684\u7b2c\u4e00\u5929<\/td><\/tr><tr><td>decade<\/td><td>\u5341\u5e74<\/td><td>\u5e74\u4efd\u768410\u53d6\u6574\u3002\u6bd4\u59822023\u5e74\u7b97202\u4e2a10\u5e74\u3002<\/td><td>\u65e5\u671f\u6240\u572810\u5e74\u7684\u7b2c\u4e00\u5929\u3002\u65f6\u95f4\u4e3a0<\/td><\/tr><tr><td>dow<\/td><td>\u5468\u7684\u7b2c\u51e0\u59290-6<\/td><td>\u65e5\u671f\u662f\u6240\u5728\u5468\u7684\u7b2c\u51e0\u5929\u3002\u5468\u65e5\u4e3a0\uff0c\u5468\u4e00\u4e3a1\uff0c\u5468\u516d\u4e3a6<br>\u6ce8\u610f\u548cisodow\u7684\u533a\u522b<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>doy<\/td><td>\u5e74\u7684\u7b2c\u51e0\u5929<\/td><td>\u65e5\u671f\u662f\u5f53\u524d\u7684\u7b2c\u51e0\u5929<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>epoch<\/td><td>\u5e26\u5fae\u79d2\u7684\u65f6\u95f4\u6233<\/td><td><span class=\"has-inline-color has-luminous-vivid-orange-color\">extract\u652f\u6301<\/span>\uff0c\u4e0eunix_timestamp\u7c7b\u4f3c\uff0c\u591a\u4e86\u5fae\u79d2\u90e8\u5206(\u5982\u679c\u6709\u7684\u8bdd)<br>1682046733.56789<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>isodow<\/td><td>\u5468\u7684\u7b2c\u51e0\u59291-7<\/td><td>\u65e5\u671f\u662f\u6240\u5728\u5468\u7684\u7b2c\u51e0\u5929\u3002\u5468\u4e00\u4e3a1\uff0c\u5468\u516d\u4e3a6,\u5468\u65e5\u4e3a7<br>\u6ce8\u610f\u548cdow\u7684\u533a\u522b<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>isoyear<\/td><td>\u65e5\u671f\u843d\u5728iso8601\u5468\u7f16\u53f7\u7684\u5e74<\/td><td>\u6309\u7167iso8601\u7f16\u53f7\uff0c\u6bcf\u5e74\u7b2c\u4e00\u4e2a\u5468\u56db\u6240\u5728\u7684\u5468\u4f5c\u4e3a\u8be5\u5e74\u7684\u7b2c\u4e00\u5468\u3002\u4e70\u5e74\u6700\u540e\u4e00\u4e2a\u5468\u56db\u6240\u5728\u7684\u5468\u4f5c\u4e3a\u8be5\u5e74\u7684\u6700\u540e\u4e00\u5468\u3002\u6240\u4ee5\u5e74\u521d\uff0c\u5e74\u672b\u7684\u65e5\u671f\uff0c\u53ef\u80fd\u662f\u4e0a\u4e00\u5e74\u6216\u8005\u4e0b\u4e00\u5e74\u7684\u3002<br>\u6ce8\u610f\u548cyear\u7684\u533a\u522b\u3002<\/td><td>\u4e0d\u652f\u6301<\/td><\/tr><tr><td>millennium<\/td><td>\u5343\u5e74<\/td><td>\u5f53\u524d\u5e74\u4efd\u662f\u7b2c\u51e0\u4e2a\u5343\u5e74<br>0001-1000 \u4e3a\u7b2c1\u4e2a\u5343\u5e74<br>1001-2000 \u4e3a\u7b2c2\u4e2a\u5343\u5e74<br>2001-3000 \u4e3a\u7b2c3\u4e2a\u5343\u5e74 ...<\/td><td>\u65e5\u671f\u6240\u5728\u5343\u5e74\u7684\u7b2c\u4e00\u5929\u3002<\/td><\/tr><tr><td>milliseconds<\/td><td>\u79d2\uff0c\u6beb\u79d2<\/td><td>\u8fd4\u56de\u65f6\u95f4\u4e2d\u7684\u79d2\u548c\u6beb\u79d2\u90e8\u5206<\/td><td>\u6beb\u79d2\u4ee5\u4e0b\u8bbe\u7f6e\u4e3a0<\/td><\/tr><tr><td>microseconds<\/td><td>\u79d2\uff0c\u5fae\u79d2<br>\u7b49\u540c\u4e8esecond_microsecond<\/td><td>\u8fd4\u56de\u79d2\uff0c\u5fae\u79d2\u90e8\u5206\u3002<br>\u6ce8\u610f\u683c\u5f0f\u4e3assXXXXXX<\/td><td>\u5fae\u79d2\u4ee5\u4e0b\u8bbe\u7f6e\u4e3a0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"year\"><\/span>year<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u8fd4\u56de\u65e5\u671f\u5e74\u7684\u90e8\u5206\u3002<\/p>\n\n\n\n<p>\u53c2\u6570\u662f\u5426\u6709\u53cc\u5f15\u53f7\u5747\u53ef\uff0c\u540e\u9762\u7684\u4f8b\u5b50\u4e0d\u518d\u91cd\u590d\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(year,'2023-04-23 11:12:13.56789');\n+---------------------------------------------+\n| date_part(year,'2023-04-23 11:12:13.56789') |\n+---------------------------------------------+\n|                                        2023 |\n+---------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select date_part('year','2023-04-23 11:12:13.56789');\n+-----------------------------------------------+\n| date_part('year','2023-04-23 11:12:13.56789') |\n+-----------------------------------------------+\n|                                          2023 |\n+-----------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(year from '2023-04-23 11:12:13.56789');\n+------------------------------------------------+\n| extract(year from '2023-04-23 11:12:13.56789') |\n+------------------------------------------------+\n|                                           2023 |\n+------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"year_month\"><\/span>year_month<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u7684\u5e74\u6708\u90e8\u5206\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(year_month,'2023-04-23 11:12:13.56789');\n+---------------------------------------------------+\n| date_part(year_month,'2023-04-23 11:12:13.56789') |\n+---------------------------------------------------+\n|                                            202304 |\n+---------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(year_month from '2023-04-23 11:12:13.56789');\n+------------------------------------------------------+\n| extract(year_month from '2023-04-23 11:12:13.56789') |\n+------------------------------------------------------+\n|                                               202304 |\n+------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"quarter\"><\/span>quarter<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u6240\u5728\u5b63\u5ea6<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(quarter,'2023-04-23 11:12:13.56789');\n+------------------------------------------------+\n| date_part(quarter,'2023-04-23 11:12:13.56789') |\n+------------------------------------------------+\n|                                              2 |\n+------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(quarter from '2023-04-23 11:12:13.56789');\n+---------------------------------------------------+\n| extract(quarter from '2023-04-23 11:12:13.56789') |\n+---------------------------------------------------+\n|                                                 2 |\n+---------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"month\"><\/span>month<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u6240\u5728\u6708\u4efd<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(month,'2023-04-23 11:12:13.56789');\n+----------------------------------------------+\n| date_part(month,'2023-04-23 11:12:13.56789') |\n+----------------------------------------------+\n|                                            4 |\n+----------------------------------------------+\n1 row in set (Elapsed: 00:00:00.01)\n\ngbase&gt; select extract(month from '2023-04-23 11:12:13.56789');\n+-------------------------------------------------+\n| extract(month from '2023-04-23 11:12:13.56789') |\n+-------------------------------------------------+\n|                                               4 |\n+-------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"week\"><\/span>week<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u6240\u5728\u5468\uff0c\u4e0eweek(XXX)\u8fd4\u56de\u4e00\u81f4\u3002 \u6839\u636e\u6a21\u5f0f\u4e0d\u540c\uff0c\u6bcf\u5e74\u7684\u524d\u51e0\u5929\uff0c\u53ef\u80fd\u662f\u7b2c0\u5468\u6216\u7b2c1\u5468\u3002<\/p>\n\n\n\n<p>\u53c2\u8003 <br><a href=\"https:\/\/www.gbase8.cn\/en\/3129\/?hilite=week\">GBase 8a\u7684<mark>week<\/mark>\u51fd\u6570\u6a21\u5f0f\u5b9e\u73b0\u6bcf\u5e74\u7684\u7b2c1\u5929\u603b\u662f\u7b2c1\u5468\uff0c\u54ea\u6015\u5c311\u5929\u4e5f\u7b97<\/a><br><a href=\"https:\/\/www.gbase8.cn\/en\/904\/?hilite=week\">GBase 8a\u6570\u636e\u5e93\u914d\u7f6e\u53c2\u6570default_<mark>week<\/mark>_format\u8bbe\u7f6e\u661f\u671f\u7684\u6a21\u5f0f<\/a><\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(week,'2023-04-23 11:12:13.56789');\n+---------------------------------------------+\n| date_part(week,'2023-04-23 11:12:13.56789') |\n+---------------------------------------------+\n|                                          17 |\n+---------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(week from '2023-04-23 11:12:13.56789');\n+------------------------------------------------+\n| extract(week from '2023-04-23 11:12:13.56789') |\n+------------------------------------------------+\n|                                             17 |\n+------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"day\"><\/span>day<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u7684\u5929\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(day,'2023-04-23 11:12:13.56789');\n+--------------------------------------------+\n| date_part(day,'2023-04-23 11:12:13.56789') |\n+--------------------------------------------+\n|                                         23 |\n+--------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(day from '2023-04-23 11:12:13.56789');\n+-----------------------------------------------+\n| extract(day from '2023-04-23 11:12:13.56789') |\n+-----------------------------------------------+\n|                                            23 |\n+-----------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"day_hour\"><\/span>day_hour<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u5929\u548c\u5c0f\u65f6<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(day_hour,'2023-04-23 11:12:13.56789');\n+-------------------------------------------------+\n| date_part(day_hour,'2023-04-23 11:12:13.56789') |\n+-------------------------------------------------+\n|                                            2311 |\n+-------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(day_hour from '2023-04-23 11:12:13.56789');\n+----------------------------------------------------+\n| extract(day_hour from '2023-04-23 11:12:13.56789') |\n+----------------------------------------------------+\n|                                               2311 |\n+----------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"day_minute\"><\/span>day_minute<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u5929\u3001\u5c0f\u65f6\u548c\u5206\u949f\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(day_minute,'2023-04-23 11:12:13.56789');\n+---------------------------------------------------+\n| date_part(day_minute,'2023-04-23 11:12:13.56789') |\n+---------------------------------------------------+\n|                                            231112 |\n+---------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(day_minute from '2023-04-23 11:12:13.56789');\n+------------------------------------------------------+\n| extract(day_minute from '2023-04-23 11:12:13.56789') |\n+------------------------------------------------------+\n|                                               231112 |\n+------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"day_second\"><\/span>day_second<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u5929\u3001\u5c0f\u65f6\u3001\u5206\u949f\u548c\u79d2\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(day_second,'2023-04-23 11:12:13.56789');\n+---------------------------------------------------+\n| date_part(day_second,'2023-04-23 11:12:13.56789') |\n+---------------------------------------------------+\n|                                          23111213 |\n+---------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(day_second from '2023-04-23 11:12:13.56789');\n+------------------------------------------------------+\n| extract(day_second from '2023-04-23 11:12:13.56789') |\n+------------------------------------------------------+\n|                                             23111213 |\n+------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"hour\"><\/span>hour<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u5c0f\u65f6<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(hour,'2023-04-23 11:12:13.56789');\n+---------------------------------------------+\n| date_part(hour,'2023-04-23 11:12:13.56789') |\n+---------------------------------------------+\n|                                          11 |\n+---------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(hour from '2023-04-23 11:12:13.56789');\n+------------------------------------------------+\n| extract(hour from '2023-04-23 11:12:13.56789') |\n+------------------------------------------------+\n|                                             11 |\n+------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"hour_minute\"><\/span>hour_minute<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u5c0f\u65f6\u548c\u5206\u949f\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(hour_minute,'2023-04-23 11:12:13.56789');\n+----------------------------------------------------+\n| date_part(hour_minute,'2023-04-23 11:12:13.56789') |\n+----------------------------------------------------+\n|                                               1112 |\n+----------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(hour_minute from '2023-04-23 11:12:13.56789');\n+-------------------------------------------------------+\n| extract(hour_minute from '2023-04-23 11:12:13.56789') |\n+-------------------------------------------------------+\n|                                                  1112 |\n+-------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"hour_second\"><\/span>hour_second<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u5c0f\u65f6\u3001\u5206\u949f\u548c\u79d2\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(hour_second,'2023-04-23 11:12:13.56789');\n+----------------------------------------------------+\n| date_part(hour_second,'2023-04-23 11:12:13.56789') |\n+----------------------------------------------------+\n|                                             111213 |\n+----------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(hour_second from '2023-04-23 11:12:13.56789');\n+-------------------------------------------------------+\n| extract(hour_second from '2023-04-23 11:12:13.56789') |\n+-------------------------------------------------------+\n|                                                111213 |\n+-------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"minute\"><\/span>minute<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u5206\u949f<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(minute,'2023-04-23 11:12:13.56789');\n+-----------------------------------------------+\n| date_part(minute,'2023-04-23 11:12:13.56789') |\n+-----------------------------------------------+\n|                                            12 |\n+-----------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(minute from '2023-04-23 11:12:13.56789');\n+--------------------------------------------------+\n| extract(minute from '2023-04-23 11:12:13.56789') |\n+--------------------------------------------------+\n|                                               12 |\n+--------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"minute_second\"><\/span>minute_second<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u5206\u949f\u548c\u79d2<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(minute_second,'2023-04-23 11:12:13.56789');\n+------------------------------------------------------+\n| date_part(minute_second,'2023-04-23 11:12:13.56789') |\n+------------------------------------------------------+\n|                                                 1213 |\n+------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(minute_second from '2023-04-23 11:12:13.56789');\n+---------------------------------------------------------+\n| extract(minute_second from '2023-04-23 11:12:13.56789') |\n+---------------------------------------------------------+\n|                                                    1213 |\n+---------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"second\"><\/span>second<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u79d2<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(second,'2023-04-23 11:12:13.56789');\n+-----------------------------------------------+\n| date_part(second,'2023-04-23 11:12:13.56789') |\n+-----------------------------------------------+\n|                                            13 |\n+-----------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(second from '2023-04-23 11:12:13.56789');\n+--------------------------------------------------+\n| extract(second from '2023-04-23 11:12:13.56789') |\n+--------------------------------------------------+\n|                                               13 |\n+--------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"millisecond\"><\/span>millisecond<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u6beb\u79d2\u3002\u4e5f\u5c31\u662f\u79d2\u4ee5\u4e0b6\u4f4d\u5fae\u79d2\u6570\u5b57\u9664\u4ee51000\u622a\u65ad\u53d6\u6574\uff0c\u6ca1\u6709\u56db\u820d\u4e94\u5165\u3002<\/p>\n\n\n\n<p>\u6ce8\u610f\u5c0f\u6570\u70b9\u540e\u5982\u679c\u4e0d\u8db36\u4f4d\uff0c\u8981\u6309\u5728\u672b\u5c3e\u88650\u7684\u60c5\u51b5\u8003\u8651\u3002 0.1 \u548c 0.100000\u5bf9\u5e94\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(millisecond,'2023-04-23 11:12:13.56789');\n+----------------------------------------------------+\n| date_part(millisecond,'2023-04-23 11:12:13.56789') |\n+----------------------------------------------------+\n|                                                567 |\n+----------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(millisecond from '2023-04-23 11:12:13.56789');\n+-------------------------------------------------------+\n| extract(millisecond from '2023-04-23 11:12:13.56789') |\n+-------------------------------------------------------+\n|                                                   567 |\n+-------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"microsecond\"><\/span>microsecond<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u5fae\u79d2\u90e8\u5206\u3002\u6ce8\u610f\u5f53\u524d\u8fd4\u56de\u503c\u4e3a6\u4f4d\u6570\u7684\u5fae\u79d2\u3002\u5982\u679c\u60f3\u5ffd\u7565\u6389\u8d85\u8fc71000\u90e8\u5206\uff0c\u9700\u8981%1000\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(microsecond,'2023-04-23 11:12:13.56789');\n+----------------------------------------------------+\n| date_part(microsecond,'2023-04-23 11:12:13.56789') |\n+----------------------------------------------------+\n|                                             567890 |\n+----------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(microsecond from '2023-04-23 11:12:13.56789');\n+-------------------------------------------------------+\n| extract(microsecond from '2023-04-23 11:12:13.56789') |\n+-------------------------------------------------------+\n|                                                567890 |\n+-------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"day_microsecond\"><\/span>day_microsecond<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u5929\u3001\u5c0f\u65f6\u3001\u5206\u949f\u3001\u79d2\u548c\u5fae\u79d2\u3002\u5fae\u79d2\u4e0d\u8db36\u4f4d\u7684\uff0c\u6700\u540e\u88650\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(day_microsecond,'2023-04-23 11:12:13.56789');\n+--------------------------------------------------------+\n| date_part(day_microsecond,'2023-04-23 11:12:13.56789') |\n+--------------------------------------------------------+\n|                                         23111213567890 |\n+--------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(day_microsecond from '2023-04-23 11:12:13.56789');\n+-----------------------------------------------------------+\n| extract(day_microsecond from '2023-04-23 11:12:13.56789') |\n+-----------------------------------------------------------+\n|                                            23111213567890 |\n+-----------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"hour_microsecond\"><\/span>hour_microsecond<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u5c0f\u65f6\u3001\u5206\u949f\u3001\u79d2\u548c\u5fae\u79d2\u3002\u5fae\u79d2\u4e0d\u8db36\u4f4d\u7684\uff0c\u6700\u540e\u88650\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(hour_microsecond,'2023-04-23 11:12:13.56789');\n+---------------------------------------------------------+\n| date_part(hour_microsecond,'2023-04-23 11:12:13.56789') |\n+---------------------------------------------------------+\n|                                            111213567890 |\n+---------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(hour_microsecond from '2023-04-23 11:12:13.56789');\n+------------------------------------------------------------+\n| extract(hour_microsecond from '2023-04-23 11:12:13.56789') |\n+------------------------------------------------------------+\n|                                               111213567890 |\n+------------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"minute_microsecond\"><\/span>minute_microsecond<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u5206\u949f\u3001\u79d2\u548c\u5fae\u79d2\u90e8\u5206\u3002\u5fae\u79d2\u4e0d\u8db36\u4f4d\u7684\uff0c\u6700\u540e\u88650\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(minute_microsecond,'2023-04-23 11:12:13.56789');\n+-----------------------------------------------------------+\n| date_part(minute_microsecond,'2023-04-23 11:12:13.56789') |\n+-----------------------------------------------------------+\n|                                                1213567890 |\n+-----------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(minute_microsecond from '2023-04-23 11:12:13.56789');\n+--------------------------------------------------------------+\n| extract(minute_microsecond from '2023-04-23 11:12:13.56789') |\n+--------------------------------------------------------------+\n|                                                   1213567890 |\n+--------------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"second_microsecond\"><\/span>second_microsecond<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u79d2\u548c\u5fae\u79d2\u90e8\u5206\u3002\u5fae\u79d2\u4e0d\u8db36\u4f4d\u7684\uff0c\u6700\u540e\u88650\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(second_microsecond,'2023-04-23 11:12:13.56789');\n+-----------------------------------------------------------+\n| date_part(second_microsecond,'2023-04-23 11:12:13.56789') |\n+-----------------------------------------------------------+\n|                                                  13567890 |\n+-----------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(second_microsecond from '2023-04-23 11:12:13.56789');\n+--------------------------------------------------------------+\n| extract(second_microsecond from '2023-04-23 11:12:13.56789') |\n+--------------------------------------------------------------+\n|                                                     13567890 |\n+--------------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"century\"><\/span>century<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u8be5\u65e5\u671f\u6240\u5728\u4e16\u7eaa\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(century,'2023-04-23 11:12:13.56789');\n+------------------------------------------------+\n| date_part(century,'2023-04-23 11:12:13.56789') |\n+------------------------------------------------+\n|                                             21 |\n+------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(century from '2023-04-23 11:12:13.56789');\n+---------------------------------------------------+\n| extract(century from '2023-04-23 11:12:13.56789') |\n+---------------------------------------------------+\n|                                                21 |\n+---------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"decade\"><\/span>decade<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u6240\u572810\u5e74<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(decade,'2023-04-23 11:12:13.56789');\n+-----------------------------------------------+\n| date_part(decade,'2023-04-23 11:12:13.56789') |\n+-----------------------------------------------+\n|                                           202 |\n+-----------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(decade from '2023-04-23 11:12:13.56789');\n+--------------------------------------------------+\n| extract(decade from '2023-04-23 11:12:13.56789') |\n+--------------------------------------------------+\n|                                              202 |\n+--------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"dow\"><\/span>dow<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Day of Week \u8be5\u65e5\u671f\u4e3a\u6240\u5728\u65e5\u671f\u7684\u7b2c\u51e0\u5929\u3002\u5468\u65e5\u4e3a0\uff0c\u5468\u516d\u4e3a6\u3002\u8bf7\u533a\u5206isodow\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(dow,'2023-04-23 11:12:13.56789');\n+--------------------------------------------+\n| date_part(dow,'2023-04-23 11:12:13.56789') |\n+--------------------------------------------+\n|                                          0 |\n+--------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(dow from '2023-04-23 11:12:13.56789');\n+-----------------------------------------------+\n| extract(dow from '2023-04-23 11:12:13.56789') |\n+-----------------------------------------------+\n|                                             0 |\n+-----------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"doy\"><\/span>doy<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>day of year \u8be5\u65e5\u671f\u4e3a\u6240\u5728\u5e74\u7684\u7b2c\u51e0\u5929\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(doy,'2023-04-23 11:12:13.56789');\n+--------------------------------------------+\n| date_part(doy,'2023-04-23 11:12:13.56789') |\n+--------------------------------------------+\n|                                        113 |\n+--------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(doy from '2023-04-23 11:12:13.56789');\n+-----------------------------------------------+\n| extract(doy from '2023-04-23 11:12:13.56789') |\n+-----------------------------------------------+\n|                                           113 |\n+-----------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"epoch\"><\/span>epoch<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u8be5\u65e5\u671f\u5e26\u5fae\u79d2\u7684\u65f6\u95f4\u6233\u3002\u4e0eunix_timestamp\u7c7b\u4f3c\u3002<\/p>\n\n\n\n<p>date_part\u6682\u65f6\u4e0d\u652f\u6301\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(epoch,'2023-04-23 11:12:13.56789');\nERROR 1733 (HY000): (GBA-01EX-700) Gbase general error: This version of GBase doesn't yet support 'EPOCH in date_part\ngbase&gt;\ngbase&gt; select extract(epoch from '2023-04-23 11:12:13.56789') a,unix_timestamp('2023-04-23 11:12:13.56789') b;\n+------------------+------------+\n| a                | b          |\n+------------------+------------+\n| 1682219533.56789 | 1682219533 |\n+------------------+------------+\n1 row in set (Elapsed: 00:00:00.00)<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"isodow\"><\/span>isodow<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>ISO8601  Day of Week \u8be5\u65e5\u671f\u4e3a\u6240\u5728\u65e5\u671f\u7684\u7b2c\u51e0\u5929\u3002\u5468\u65e5\u4e3a7\uff0c\u5468\u4e00\u4e3a1\u3002\u8bf7\u533a\u5206dow\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(isodow,'2023-04-23 11:12:13.56789');\n+-----------------------------------------------+\n| date_part(isodow,'2023-04-23 11:12:13.56789') |\n+-----------------------------------------------+\n|                                             7 |\n+-----------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(isodow from '2023-04-23 11:12:13.56789');\n+--------------------------------------------------+\n| extract(isodow from '2023-04-23 11:12:13.56789') |\n+--------------------------------------------------+\n|                                                7 |\n+--------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"isoyear\"><\/span>isoyear<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6309\u7167ISO8601 \u6bcf\u5e74\u7b2c\u4e00\u4e2a\u5468\u56db\u5468\u56db\u6240\u5728\u7684\u5468\u4e3a\u7b2c\u4e00\u5468\uff0c\u6700\u540e\u4e00\u4e2a\u5468\u56db\u4e3a\u6700\u540e\u4e00\u5468\u3002\u6240\u4ee5\u5e74\u521d\u548c\u5e74\u5c3e\u7684\u65e5\u671f\u65e5\u671f\u53ef\u80fd\u5c5e\u4e8e\u4e0a\u4e00\u5e74\u6216\u8005\u4e0b\u4e00\u5e74\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(isoyear,'2023-01-01 11:12:13.56789') isoyear,date_part(year,'2023-01-01 11:12:13.56789') year;\n+---------+------+\n| isoyear | year |\n+---------+------+\n|    2022 | 2023 |\n+---------+------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(isoyear from '2023-01-01 11:12:13.56789') isoyear,extract(year from '2023-01-01 11:12:13.56789') year;\n+---------+------+\n| isoyear | year |\n+---------+------+\n|    2022 | 2023 |\n+---------+------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select date_part(isoyear,'<span class=\"has-inline-color has-luminous-vivid-orange-color\">2024-12-31<\/span> 11:12:13.56789');\n+------------------------------------------------+\n| date_part(isoyear,'2024-12-31 11:12:13.56789') |\n+------------------------------------------------+\n|                                           <span class=\"has-inline-color has-luminous-vivid-orange-color\">2025<\/span> |\n+------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"millennium\"><\/span>millennium<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u6240\u5728\u7684\u7b2c\u51e0\u4e2a\u5343\u5e74\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase&gt; select date_part(millennium,'2023-04-23 11:12:13.56789');\n+---------------------------------------------------+\n| date_part(millennium,'2023-04-23 11:12:13.56789') |\n+---------------------------------------------------+\n|                                                 3 |\n+---------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select extract(millennium from '2023-04-23 11:12:13.56789');\n+------------------------------------------------------+\n| extract(millennium from '2023-04-23 11:12:13.56789') |\n+------------------------------------------------------+\n|                                                    3 |\n+------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"milliseconds\"><\/span>milliseconds<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u7684\u79d2\u548c\u6beb\u79d2\u90e8\u5206\uff0c\u5355\u4f4d\u662f\u6beb\u79d2<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase> select date_part(milliseconds,'2023-04-23 11:12:13.56789');\r\n+-----------------------------------------------------+\r\n| date_part(milliseconds,'2023-04-23 11:12:13.56789') |\r\n+-----------------------------------------------------+\r\n|                                            13567.89 |\r\n+-----------------------------------------------------+\r\n1 row in set (Elapsed: 00:00:00.00)\r\ngbase> select extract(milliseconds from '2023-04-23 11:12:13.56789');\r\n+--------------------------------------------------------+\r\n| extract(milliseconds from '2023-04-23 11:12:13.56789') |\r\n+--------------------------------------------------------+\r\n|                                               13567.89 |\r\n+--------------------------------------------------------+\r\n1 row in set (Elapsed: 00:00:00.00)<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"microseconds\"><\/span>microseconds<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u671f\u4e2d\u7684\u79d2\u5230\u5fae\u79d2\u90e8\u5206\uff0c\u5355\u4f4d\u662f\u5fae\u79d2<\/p>\n\n\n\n<pre class=\"wp-block-code has-small-font-size\"><code>gbase> select date_part(microseconds,'2023-04-23 11:12:13.56789');\r\n+-----------------------------------------------------+\r\n| date_part(microseconds,'2023-04-23 11:12:13.56789') |\r\n+-----------------------------------------------------+\r\n|                                            13567890 |\r\n+-----------------------------------------------------+\r\n1 row in set (Elapsed: 00:00:00.00)\r\n\r\ngbase> select extract(microseconds from '2023-04-23 11:12:13.56789');\r\n+--------------------------------------------------------+\r\n| extract(microseconds from '2023-04-23 11:12:13.56789') |\r\n+--------------------------------------------------------+\r\n|                                               13567890 |\r\n+--------------------------------------------------------+\r\n1 row in set (Elapsed: 00:00:00.00)\r\n\n<\/code><\/pre>","protected":false},"excerpt":{"rendered":"<p>\u5357\u5927\u901a\u7528GBase 8a\u63d0\u4f9b\u4e86date_part\u6765\u63d0\u53d6\u65e5\u671f\u7684\u90e8\u5206\u5c5e\u6027\uff0c\u540c\u65f6\u63d0\u4f9b\u4e86\u4e0eoracle\u517c\u5bb9\u7684extract\u51fd\u6570\u3002\u672c\u6587\u4ecb\u7ecd\u8fd92\u4e2a\u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[36],"class_list":["post-11604","post","type-post","status-publish","format-standard","hentry","category-gbase8a","tag-36"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/11604","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/comments?post=11604"}],"version-history":[{"count":61,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/11604\/revisions"}],"predecessor-version":[{"id":11768,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/11604\/revisions\/11768"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=11604"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=11604"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=11604"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}