{"id":8038,"date":"2021-09-18T16:54:50","date_gmt":"2021-09-18T08:54:50","guid":{"rendered":"https:\/\/www.gbase8.cn\/?p=8038"},"modified":"2021-09-18T16:54:51","modified_gmt":"2021-09-18T08:54:51","slug":"gbase-8a%e9%80%9a%e8%bf%8718%e4%bd%8d%e8%ba%ab%e4%bb%bd%e8%af%81%e5%8f%b7%e7%a0%81%e5%88%a4%e6%96%ad%e7%94%b7%e5%a5%b3%e6%80%a7%e5%88%ab","status":"publish","type":"post","link":"https:\/\/www.gbase8.cn\/en\/8038","title":{"rendered":"\u5357\u5927\u901a\u7528GBase 8a\u901a\u8fc718\u4f4d\u8eab\u4efd\u8bc1\u53f7\u7801\u5224\u65ad\u7537\u5973\u6027\u522b"},"content":{"rendered":"<p>18\u4f4d\u7684\u8eab\u4efd\u8bc1\uff0c\u5176\u5012\u6570\u7b2c2\u4f4d\u533a\u5206\u7537\u5973\uff0c\u5355\u6570\u662f\u7537\uff0c\u53cc\u6570\u662f\u5973\u3002\u672c\u6587\u901a\u8fc7GBase 8a\u7528SQL\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u8be5\u529f\u80fd\u7684\u51e0\u4e2a\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-6a2aadfb0a09e\" 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-6a2aadfb0a09e\"  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\/8038\/#%E5%88%86%E6%9E%90\" >Analyse<\/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\/8038\/#%E5%AE%9E%E7%8E%B0%E4%BB%A3%E7%A0%81\" >\u5b9e\u73b0\u4ee3\u7801<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.gbase8.cn\/en\/8038\/#%E6%95%B0%E5%AD%97%E6%93%8D%E4%BD%9C%E6%96%B9%E6%B3%95\" >\u6570\u5b57\u64cd\u4f5c\u65b9\u6cd5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.gbase8.cn\/en\/8038\/#%E5%AD%97%E7%AC%A6%E4%B8%B2%E6%88%AA%E5%8F%96%E6%96%B9%E5%BC%8F\" >\u5b57\u7b26\u4e32\u622a\u53d6\u65b9\u5f0f<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%88%86%E6%9E%90\"><\/span>Analyse<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u4ece18\u4f4d\u7684\u6570\u5b57\uff0c\u83b7\u5f97\u5012\u6570\u7b2c\u4e8c\u4f4d\u7684\u6570\u5b57\uff0c\u53ef\u4ee5\u7528\u5b57\u7b26\u4e32\u622a\u53d6\uff0c\u4e5f\u53ef\u4ee5\u7528\u6570\u5b57\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>\u5224\u65ad\u5947\u5076\uff0c\u4e00\u822c\u91c7\u7528\u53d6\u6a212\u7684\u65b9\u5f0f\uff0c %2  \u5982\u679c\u4e3a0\u5219\u662f\u5076\u6570\uff0c\u4e3a1\u5219\u662f\u5947\u6570\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%AE%9E%E7%8E%B0%E4%BB%A3%E7%A0%81\"><\/span>\u5b9e\u73b0\u4ee3\u7801<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%95%B0%E5%AD%97%E6%93%8D%E4%BD%9C%E6%96%B9%E6%B3%95\"><\/span>\u6570\u5b57\u64cd\u4f5c\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u6ce8\u610f\uff0c\u6570\u5b57\u9664\u4ee510\u540e\uff0c\u9ed8\u8ba4\u662f\u6d6e\u70b9\u6570\uff0c\u8981\u7528floor\u51fd\u6570\u53d6\u6574\uff0c\u518d\u53d6\u6a21\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase> select floor(123456789012345678\/10)%2;\r\n+--------------------------------+\r\n| floor(123456789012345678\/10)%2 |\r\n+--------------------------------+\r\n|                              1 |\r\n+--------------------------------+\r\n1 row in set (Elapsed: 00:00:00.00)\r\n\r\ngbase> select floor(123456789012345688\/10)%2;\r\n+--------------------------------+\r\n| floor(123456789012345688\/10)%2 |\r\n+--------------------------------+\r\n|                              0 |\r\n+--------------------------------+\r\n1 row in set (Elapsed: 00:00:00.00)\r\n\r\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%AD%97%E7%AC%A6%E4%B8%B2%E6%88%AA%E5%8F%96%E6%96%B9%E5%BC%8F\"><\/span>\u5b57\u7b26\u4e32\u622a\u53d6\u65b9\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u91c7\u7528left, right\u51fd\u6570\u76f8\u5bf9\u7b80\u5355\u4e9b\u3002\u53f3\u9762\u53d62\u4f4d\uff0c\u518d\u5de6\u9762\u53d61\u4f4d\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase> select left(right(123456789012345678,2),1) % 2;\r\n+-------------------------------------------+\r\n| left(right('123456789012345678',2),1) % 2 |\r\n+-------------------------------------------+\r\n|                                         1 |\r\n+-------------------------------------------+\r\n1 row in set (Elapsed: 00:00:00.00)<\/code><\/pre>\n\n\n\n<p>\u622a\u53d6substring\u7684\u5199\u6cd5\u5f88\u7e41\u7410\uff0c\u800c\u4e14\u8fd8\u8981\u8f6c\u6210\u6570\u5b57\u518d\u505a\u53d6\u6a21\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase> select cast(substr(123456789012345688,length(123456789012345688)-1,1) as int) % 2;\r\n+----------------------------------------------------------------------------+\r\n| cast(substr(123456789012345688,length(123456789012345688)-1,1) as int) % 2 |\r\n+----------------------------------------------------------------------------+\r\n|                                                                          0 |\r\n+----------------------------------------------------------------------------+\r\n1 row in set (Elapsed: 00:00:00.00)\r\n\r\ngbase> select cast(substr(123456789012345678,length(123456789012345678)-1,1) as int) % 2;\r\n+----------------------------------------------------------------------------+\r\n| cast(substr(123456789012345678,length(123456789012345678)-1,1) as int) % 2 |\r\n+----------------------------------------------------------------------------+\r\n|                                                                          1 |\r\n+----------------------------------------------------------------------------+\r\n1 row in set (Elapsed: 00:00:00.00)\r\n<\/code><\/pre>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>18\u4f4d\u7684\u8eab\u4efd\u8bc1\uff0c\u5176\u5012\u6570\u7b2c2\u4f4d\u533a\u5206\u7537\u5973\uff0c\u5355\u6570\u662f\u7537\uff0c\u53cc\u6570\u662f\u5973\u3002\u672c\u6587\u901a\u8fc7GBase 8a\u7528SQL\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u8be5\u529f\u80fd\u7684\u51e0\u4e2a\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":[4],"tags":[],"class_list":["post-8038","post","type-post","status-publish","format-standard","hentry","category-gbase8a"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/8038","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=8038"}],"version-history":[{"count":7,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/8038\/revisions"}],"predecessor-version":[{"id":8045,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/8038\/revisions\/8045"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=8038"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=8038"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=8038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}