{"id":3171,"date":"2021-01-08T10:36:53","date_gmt":"2021-01-08T02:36:53","guid":{"rendered":"https:\/\/www.gbase8.cn\/?p=3171"},"modified":"2021-01-08T11:59:32","modified_gmt":"2021-01-08T03:59:32","slug":"gbase-8a%e5%92%8c%e5%a4%a9day%e6%9c%89%e5%85%b3%e7%9a%84%e5%87%bd%e6%95%b0%e4%bd%bf%e7%94%a8%e5%92%8c%e6%a0%b7%e4%be%8b%e6%b1%87%e6%80%bb","status":"publish","type":"post","link":"https:\/\/www.gbase8.cn\/en\/3171","title":{"rendered":"\u5357\u5927\u901a\u7528GBase 8a\u548c\u5929day\u6709\u5173\u7684\u51fd\u6570\u4f7f\u7528\u548c\u6837\u4f8b\u6c47\u603b"},"content":{"rendered":"<p>\u672c\u6587\u6c47\u603bGBase 8a\u6570\u636e\u5e93\u96c6\u7fa4\u5185\u7f6e\u7684\u4e0e\u5929\u6709\u5173\u7684\u5404\u4e2a\u51fd\u6570\u7684\u8bed\u6cd5\u3001\u8bf4\u660e\u548c\u4f7f\u7528\u6837\u4f8b\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-6a2ae76653193\" 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-6a2ae76653193\"  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\/3171\/#DAYOFWEEK\" >DAYOFWEEK<\/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\/3171\/#WEEKDAY\" >WEEKDAY<\/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\/3171\/#DAYOFYEAR\" >DAYOFYEAR<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E8%AF%AD%E6%B3%95\" >\u8bed\u6cd5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E8%AF%B4%E6%98%8E\" >\u8bf4\u660e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E7%94%A8%E4%BE%8B\" >\u7528\u4f8b<\/a><\/li><\/ul><\/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\/3171\/#MAKEDATE\" >MAKEDATE<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E8%AF%AD%E6%B3%95-2\" >\u8bed\u6cd5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E8%AF%B4%E6%98%8E-2\" >\u8bf4\u660e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E6%A0%B7%E4%BE%8B\" >\u6837\u4f8b<\/a><\/li><\/ul><\/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\/3171\/#FROM_DAYS\" >FROM_DAYS<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E8%AF%AD%E6%B3%95-3\" >\u8bed\u6cd5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E8%AF%B4%E6%98%8E-3\" >\u8bf4\u660e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E6%A0%B7%E4%BE%8B-2\" >\u6837\u4f8b<\/a><\/li><\/ul><\/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\/3171\/#TO_DAYS\" >TO_DAYS<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E8%AF%AD%E6%B3%95-4\" >\u8bed\u6cd5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E8%AF%B4%E6%98%8E-4\" >\u8bf4\u660e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E7%94%A8%E4%BE%8B-2\" >\u7528\u4f8b<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E6%AD%A3%E5%B8%B8%E6%97%A5%E6%9C%9F\" >\u6b63\u5e38\u65e5\u671f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E6%94%AF%E6%8C%812%E4%BD%8D%E6%95%B0%E7%9A%84%E5%B9%B4%E4%BB%BD\" >\u652f\u63012\u4f4d\u6570\u7684\u5e74\u4efd<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E6%94%AF%E6%8C%81%E7%B4%A7%E5%87%91%E5%B9%B4%E6%9C%88%E6%97%A5%E5%86%99%E6%B3%95\" >\u652f\u6301\u7d27\u51d1\u5e74\u6708\u65e5\u5199\u6cd5<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E6%9E%81%E9%99%90%E6%9C%80%E4%BD%8E%E5%B9%B4%E4%BB%BD\" >\u6781\u9650\u6700\u4f4e\u5e74\u4efd<\/a><\/li><\/ul><\/li><\/ul><\/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\/3171\/#LAST_DAY\" >LAST_DAY<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E8%AF%AD%E6%B3%95-5\" >\u8bed\u6cd5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E8%AF%B4%E6%98%8E-5\" >\u8bf4\u660e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.gbase8.cn\/en\/3171\/#%E7%94%A8%E4%BE%8B-3\" >\u7528\u4f8b<\/a><\/li><\/ul><\/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\/3171\/#%E5%8F%82%E8%80%83\" >\u53c2\u8003<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"DAYOFWEEK\"><\/span><a href=\"https:\/\/www.gbase8.cn\/en\/3041\/\">DAYOFWEEK<\/a><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u8fd4\u56de date (1 = \u5468\u65e5, 2 = \u5468\u4e00, \u2026, 7 = \u5468\u516d)\u5bf9\u5e94\u7684\u5de5\u4f5c\u65e5\u7d22\u5f15\u3002<\/p>\n\n\n\n<p>\u8be6\u60c5\u8bf7\u67e5\u770b\u8fde\u63a5\u5185\u8be5\u51fd\u6570\u7684\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WEEKDAY\"><\/span><a href=\"https:\/\/www.gbase8.cn\/en\/3041\/\">WEEKDAY<\/a><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u8fd4\u56de date \u5bf9\u5e94\u7684\u661f\u671f\u7d22\u5f15(0=Monday,1=Tuesday,\u20266=Sunday)\u3002<\/p>\n\n\n\n<p>\u8be6\u60c5\u8bf7\u67e5\u770b\u8fde\u63a5\u5185\u8be5\u51fd\u6570\u7684\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"DAYOFYEAR\"><\/span>DAYOFYEAR<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 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><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>DAYOFYEAR(date)\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%AF%B4%E6%98%8E\"><\/span>\u8bf4\u660e<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u8fd4\u56de date \u662f\u4e00\u5e74\u4e2d\u7684\u7b2c\u51e0\u5929\uff0c\u8303\u56f4\u4e3a 1 \u5230 366\u3002<\/p>\n\n\n\n<p>\u8be5\u51fd\u6570\u662fMAKEDATE\u7684\u9006\u51fd\u6570\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%94%A8%E4%BE%8B\"><\/span>\u7528\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase&gt; select dayofyear('2021-01-01');\n+-------------------------+\n| dayofyear('2021-01-01') |\n+-------------------------+\n|                       1 |\n+-------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select dayofyear('2021-12-31');\n+-------------------------+\n| dayofyear('2021-12-31') |\n+-------------------------+\n|                     365 |\n+-------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"MAKEDATE\"><\/span>MAKEDATE<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%AF%AD%E6%B3%95-2\"><\/span>\u8bed\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>MAKEDATE(year,dayofyear)\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%AF%B4%E6%98%8E-2\"><\/span>\u8bf4\u660e<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u7ed9\u51fa\u5e74\u4efd\u503c year \u548c\u4e00\u5e74\u4e2d\u7684\u5929\u6570\u503c dayofyear\uff0c\u8fd4\u56de\u65e5\u671f\u503c\u3002\u5929\u6570\u8f6c\u65e5\u671f\u3002<br>dayofyear \u5fc5\u987b\u5927\u4e8e 0\uff0c\u5426\u5219\u8fd4\u56de NULL\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%A0%B7%E4%BE%8B\"><\/span>\u6837\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase&gt; select makedate(2021,32);\n+-------------------+\n| makedate(2021,32) |\n+-------------------+\n| 2021-02-01        |\n+-------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select makedate(2021,365);\n+--------------------+\n| makedate(2021,365) |\n+--------------------+\n| 2021-12-31         |\n+--------------------+\n1 row in set (Elapsed: 00:00:00.00)<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FROM_DAYS\"><\/span>FROM_DAYS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%AF%AD%E6%B3%95-3\"><\/span>\u8bed\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>FROM_DAYS(N)<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%AF%B4%E6%98%8E-3\"><\/span>\u8bf4\u660e<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u8fd4\u56de\u5929\u6570 N \u5bf9\u5e94\u7684 DATE \u503c\u3002<\/p>\n\n\n\n<p>\u8be5\u51fd\u6570\u662fto_days\u7684\u9006\u51fd\u6570\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%A0%B7%E4%BE%8B-2\"><\/span>\u6837\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u5176\u4e2d\u7684\u6570\u5b57\uff0c\u8bf7\u53c2\u8003\u540e\u9762\u7684to_days\u51fd\u6570\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase&gt; select @d,from_days(738156);\n+------------+-------------------+\n| @d         | from_days(738156) |\n+------------+-------------------+\n| 2021-01-01 | 2021-01-01        |\n+------------+-------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<p>\u6781\u9650\u6570\u5b57\u662f366\uff0c\u518d\u5c0f\u5c31\u8fd4\u56denull\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase&gt; select from_days(366);\n+----------------+\n| from_days(366) |\n+----------------+\n| 0001-01-01     |\n+----------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select from_days(365);\n+----------------+\n| from_days(365) |\n+----------------+\n| NULL           |\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=\"TO_DAYS\"><\/span>TO_DAYS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%AF%AD%E6%B3%95-4\"><\/span>\u8bed\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>TO_DAYS(date)\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%AF%B4%E6%98%8E-4\"><\/span>\u8bf4\u660e<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u8fd4\u56de\u65e5\u671f date \u5bf9\u5e94\u7684\u5929\u6570\uff08\u4ece\u5e74\u4efd 0 \u5f00\u59cb\u7684\u5929\u6570\uff09\u3002<\/p>\n\n\n\n<p>\u8be5\u51fd\u6570\u65f6from_days\u7684\u9006\u51fd\u6570\u3002<\/p>\n\n\n\n<p>TO_DAYS()\u4e0d\u7528\u4e8e\u9633\u5386(1582)\u524d\u7684\u503c\uff0c\u539f\u56e0\u662f\u5f53\u65e5\u5386\u6539\u53d8\u65f6\uff0c\u9057\u5931\u7684\u65e5\u671f\u4e0d\u4f1a\u88ab<br>\u8003\u8651\u5728\u5185\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%94%A8%E4%BE%8B-2\"><\/span>\u7528\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%AD%A3%E5%B8%B8%E6%97%A5%E6%9C%9F\"><\/span>\u6b63\u5e38\u65e5\u671f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase&gt; select to_days('2020-01-01');\n+-----------------------+\n| to_days('2020-01-01') |\n+-----------------------+\n|                737790 |\n+-----------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%94%AF%E6%8C%812%E4%BD%8D%E6%95%B0%E7%9A%84%E5%B9%B4%E4%BB%BD\"><\/span>\u652f\u63012\u4f4d\u6570\u7684\u5e74\u4efd<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>\u9ed8\u8ba4\u662f\u5f53\u524d\u4e16\u7eaa\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase&gt; select to_days('20-01-01');\n+---------------------+\n| to_days('20-01-01') |\n+---------------------+\n|              737790 |\n+---------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%94%AF%E6%8C%81%E7%B4%A7%E5%87%91%E5%B9%B4%E6%9C%88%E6%97%A5%E5%86%99%E6%B3%95\"><\/span>\u652f\u6301\u7d27\u51d1\u5e74\u6708\u65e5\u5199\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase&gt; select to_days('20200101');\n+---------------------+\n| to_days('20200101') |\n+---------------------+\n|              737790 |\n+---------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select to_days('200101');\n+-------------------+\n| to_days('200101') |\n+-------------------+\n|            737790 |\n+-------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%9E%81%E9%99%90%E6%9C%80%E4%BD%8E%E5%B9%B4%E4%BB%BD\"><\/span>\u6781\u9650\u6700\u4f4e\u5e74\u4efd<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>0001-01-01\u662f\u6700\u4f4e\u5e74\u4efd\uff0c\u4e0d\u80fd\u75280000\u5e74\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase&gt; select to_days('0000-12-01');\n+-----------------------+\n| to_days('0000-12-01') |\n+-----------------------+\n|                  NULL |\n+-----------------------+\n1 row in set, 1 warning (Elapsed: 00:00:00.00)\n\ngbase&gt; select to_days('0001-01-01');\n+-----------------------+\n| to_days('0001-01-01') |\n+-----------------------+\n|                   366 |\n+-----------------------+\n1 row in set (Elapsed: 00:00:00.00)\n<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"LAST_DAY\"><\/span>LAST_DAY<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%AF%AD%E6%B3%95-5\"><\/span>\u8bed\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>LAST_DAY(date)\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%AF%B4%E6%98%8E-5\"><\/span>\u8bf4\u660e<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u8fd4\u56de date \u6240\u5728\u6708\u6700\u540e\u4e00\u5929\u7684\u503c\u3002\u5176\u4e2d\uff0cdate \u4e3a\u65e5\u671f\u6216\u65e5\u671f\u65f6\u95f4\u7c7b\u578b\u3002\u5982<br>\u679c\u53c2\u6570 date \u65e0\u6548\uff0c\u5219\u8fd4\u56de NULL\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%94%A8%E4%BE%8B-3\"><\/span>\u7528\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u81ea\u52a8\u8ba1\u7b97\u5f53\u524d\u65e5\u671f\u6240\u5728\u6708\uff0c\u6700\u540e\u4e00\u5929\u7684\u65e5\u671f\u3002\u652f\u6301\u95f0\u5e74\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase&gt; select last_day('2021-01-01');\n+------------------------+\n| last_day('2021-01-01') |\n+------------------------+\n| 2021-01-31             |\n+------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase&gt; select last_day('2021-02-02');\n+------------------------+\n| last_day('2021-02-02') |\n+------------------------+\n| 2021-02-28             |\n+------------------------+\n1 row in set (Elapsed: 00:00:00.01)\n<\/code><\/pre>\n\n\n\n<p>\u5982\u679c\u662f\u975e\u6cd5\u65e5\u671f\uff0c\u5219\u8fd4\u56deNULL\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase&gt; select dayofyear('20210-01-01');\n+--------------------------+\n| dayofyear('20210-01-01') |\n+--------------------------+\n|                     NULL |\n+--------------------------+\n1 row in set, 1 warning (Elapsed: 00:00:00.00)\n\ngbase&gt; show warnings;\n+---------+------+-----------------------------------------+\n| Level   | Code | Message                                 |\n+---------+------+-----------------------------------------+\n| Warning | 1292 | Incorrect datetime value: '20210-01-01' |\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=\"%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\/2672\/\">GBase 8a\u5b57\u7b26\u4e32\u548c\u65e5\u671f\u51fd\u6570\u6c47\u603b\u5217\u8868<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u6c47\u603bGBase 8a\u6570\u636e\u5e93\u96c6\u7fa4\u5185\u7f6e\u7684\u4e0e\u5929\u6709\u5173\u7684\u5404\u4e2a\u51fd\u6570\u7684\u8bed\u6cd5\u3001\u8bf4\u660e\u548c\u4f7f\u7528\u6837\u4f8b<\/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-3171","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\/3171","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=3171"}],"version-history":[{"count":19,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/3171\/revisions"}],"predecessor-version":[{"id":3204,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/3171\/revisions\/3204"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=3171"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=3171"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=3171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}