{"id":505,"date":"2024-09-07T22:20:29","date_gmt":"2024-09-07T14:20:29","guid":{"rendered":"https:\/\/forelink.top\/?p=505"},"modified":"2024-09-07T22:26:21","modified_gmt":"2024-09-07T14:26:21","slug":"sql%e5%ad%98%e5%82%a8%e8%bf%87%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/forelink.top\/index.php\/2024\/09\/07\/sql%e5%ad%98%e5%82%a8%e8%bf%87%e7%a8%8b\/","title":{"rendered":"SQL\u5b58\u50a8\u8fc7\u7a0b"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"\u7b80\u4ecb\uff1a\">\u7b80\u4ecb\uff1a<\/h2>\n\n\n\n<p>\u5728\u4e00\u4e2a\u4e1a\u52a1\u903b\u8f91\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u67e5\u8be2\u591a\u6b21\u6570\u636e\u5e93\uff08\u591a\u6b21\u7f51\u7edc\u8bf7\u6c42\uff09\n\u53ef\u4ee5\u5c06\u591a\u6761SQL\u8bed\u53e5\u5c01\u88c5\u5728\u4e00\u4e2a\u96c6\u5408\u5f53\u4e2d\uff0c\u8c03\u7528\u4e1a\u52a1\u5bf9\u5e94\u7684SQL\u96c6\u5408\u3002<\/p>\n\n\n\n<p>\u5b58\u50a8\u8fc7\u7a0b\u662f\u4e8b\u5148\u7ecf\u8fc7\u7f16\u8bd1\u5e76\u5b58\u50a8\u5728\u6570\u636e\u5e93\u4e2d\u7684\u4e00\u6bb5SQL\u8bed\u53e5\u7684\u96c6\u5408\uff0c\u8c03\u7528\u5b58\u50a8\u8fc7\u7a0b\u53ef\u4ee5\u7b80\u5316\u5f00\u53d1\u4eba\u5458\u7684\u91cd\u590d\u5de5\u4f5c\uff0c\u51cf\u5c11\u7f51\u7edc\u8bf7\u6c42\u7684\u6570\u91cf\uff0c\u63d0\u5347\u5b89\u5168\uff08\u66f4\u7ec6\u7c92\u5ea6\u7684\u6743\u9650\u63a7\u5236\uff09\uff0c\u4ece\u800c\u63d0\u9ad8\u5f00\u53d1\u548c\u6570\u636e\u5904\u7406\u7684\u6548\u7387\u3002<\/p>\n\n\n\n<p>\u5b58\u50a8\u8fc7\u7a0b\u601d\u60f3\u4e0a\uff0c\u5c31\u662f\u6570\u636e\u5e93SQL\u8bed\u8a00\u5c42\u9762\u7684\u4ee3\u7801\u5c01\u88c5\u4e0e\u91cd\u7528\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0b\uff1a\">\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0b\uff1a<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE PROCEDURE &#91;name](&#91;\u53c2\u6570\u5217\u8868])\nbegin\n    --SQL\u8bed\u53e5;\nend;\n<\/code><\/pre>\n\n\n\n<p>\u5728\u4ee5\u7ec8\u7aef\u65b9\u5f0f\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-- \u5148\u5c06\u7ed3\u675f\u7b26\u4fee\u6539\u6210\u5176\u4ed6\u7b26\u53f7\uff0c\u4ee5\u907f\u514d\u8bef\u89e3\u6790SQL\u8bed\u53e5\nDELIMITER \/\/\nCREATE PROCEDURE &#91;name](&#91;\u53c2\u6570\u5217\u8868])\nBEGIN\n    --SQL\u8bed\u53e5;\nEND \/\/\n-- \u5b9a\u4e49\u7ed3\u675f\uff0c\u5c06\u7ed3\u675f\u7b26\u6062\u590d\u6210\u5206\u53f7 ;\nDELIMITER ;\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u8c03\u7528\u5b58\u50a8\u8fc7\u7a0b\uff1a\">\u8c03\u7528\u5b58\u50a8\u8fc7\u7a0b\uff1a<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>CALL &#91;name];\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u67e5\u770b\u5b58\u50a8\u8fc7\u7a0b\uff1a\">\u67e5\u770b\u5b58\u50a8\u8fc7\u7a0b\uff1a<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>-- \u67e5\u8be2\u6307\u5b9a\u6570\u636e\u5e93\u7684\u5b58\u50a8\u8fc7\u7a0b\u4ee5\u53ca\u72b6\u6001\u4fe1\u606f\nselect * from information_schema.ROUTINES where ROUTINE_SCHEMA = '&#91;database]'\nSHOW CREATE PROCEDURE &#91;name]; --\u67e5\u8be2\u67d0\u4e2a\u5b58\u50a8\u8fc7\u7a0b\u7684\u5b9a\u4e49sql\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/forelink-picgo.oss-cn-beijing.aliyuncs.com\/img\/image-20240907195550643.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/forelink-picgo.oss-cn-beijing.aliyuncs.com\/img\/image-20240907195550643.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image-20240907195550643\"\/><\/div><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u5220\u9664\u5b58\u50a8\u8fc7\u7a0b\uff1a\">\u5220\u9664\u5b58\u50a8\u8fc7\u7a0b\uff1a<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>DROP PROCEDURE &#91;if exists]&#91;name]; --\u5220\u9664\u5b58\u50a8\u8fc7\u7a0b\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u53d8\u91cf\uff1a\">\u53d8\u91cf\uff1a<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u7cfb\u7edf\u53d8\u91cf\uff1a\">\u7cfb\u7edf\u53d8\u91cf\uff1a<\/h3>\n\n\n\n<p>\u975e\u7528\u6237\u5b9a\u4e49\uff0c\u5c5e\u4e8e\u670d\u52a1\u5668\u5c42\u9762\u3002\u5206\u4e3aglobal\uff08\u5168\u5c40\u53d8\u91cf\uff09\u548csession\uff08\u4f1a\u8bdd\/\u5c40\u90e8\u53d8\u91cf\uff09<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"\u67e5\u770b\u8bbe\u7f6e\u7cfb\u7edf\u53d8\u91cf\uff1a\">\u67e5\u770b\u8bbe\u7f6e\u7cfb\u7edf\u53d8\u91cf\uff1a<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>SHOW &#91;SESSION|GLOBAL] VARIABLES; -- \u67e5\u8be2\u6240\u6709\u7cfb\u7edf\u53d8\u91cf\nSHOW &#91;SESSION|GLOBAL] VARIABLES LIKE '...'; -- \u67e5\u770b\u6307\u5b9a\u7cfb\u7edf\u53d8\u91cf\nSELECT @@&#91;SESSION|GLOBAL] &#91;\u7cfb\u7edf\u53d8\u91cf\u540d]; -- @@\u4ee3\u8868\u7684\u662f\u7cfb\u7edf\u53d8\u91cf\n-- \u8bbe\u7f6e\u7cfb\u7edf\u53d8\u91cf --\nSET &#91;SESSION|GLOBAL] &#91;\u7cfb\u7edf\u53d8\u91cf\u540d] = ...;\nset @@&#91;SESSION.|GLOBAL.]&#91;\u7cfb\u7edf\u53d8\u91cf\u540d] = ...;\n<\/code><\/pre>\n\n\n\n<p>\u5728\u91cd\u542f\u540e\uff0c\u5168\u5c40\u53d8\u91cf\u4f1a\u6062\u590d\u6210my.cnf\u4e2d\u7684\u914d\u7f6e\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u7528\u6237\u81ea\u5b9a\u4e49\u53d8\u91cf\uff1a\">\u7528\u6237\u81ea\u5b9a\u4e49\u53d8\u91cf\uff1a<\/h3>\n\n\n\n<p>\u683c\u5f0f\uff1a@\u53d8\u91cf\u540d\n\u4f5c\u7528\u57df\u4e3a\u5f53\u524dsession<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"\u8d4b\u503c\u548c\u67e5\u770b\uff1a\">\u8d4b\u503c\u548c\u67e5\u770b\uff1a<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>set @&#91;var_name] = ...;\nset @&#91;var_name] := ...; -- \u4e3a\u4e86\u533a\u5206\uff0c\u5efa\u8bae\u4f7f\u7528\u6b64\u65b9\u5f0f\nselect @&#91;var_name] := ...;\nSELECT ... into @&#91;var_name] from &#91;table_name];\n-- \u67e5\u770b --\nselect @&#91;var_name] := \u8868\u8fbe\u5f0f;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u5c40\u90e8\u53d8\u91cf\uff1a\">\u5c40\u90e8\u53d8\u91cf\uff1a<\/h3>\n\n\n\n<p>\u7528DECLARE\u58f0\u660e\uff0c\u5c40\u90e8\u53d8\u91cf\u7684\u8303\u56f4\u662f\u5728\u5176\u58f0\u660e\u7684BEGIN &#8230; END\u5757\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"\u58f0\u660e\u8d4b\u503c\">\u58f0\u660e\u8d4b\u503c<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>-- INT\/BIGINT\/CHAR\/VARCHAR\/DATE\/TIME\u7b49 default\u662f\u9ed8\u8ba4\u503c\nDECLARE &#91;\u53d8\u91cf\u540d] &#91;\u53d8\u91cf\u7c7b\u578b] &#91;default ...]\n-- \u8d4b\u503c\nset &#91;\u53d8\u91cf\u540d] = ...;\nset &#91;\u53d8\u91cf\u540d] := ...;\nselect ... into &#91;\u53d8\u91cf\u540d] from &#91;table_name];\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u8bed\u6cd5\">\u8bed\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u53c2\u6570\uff1a\">\u53c2\u6570\uff1a<\/h3>\n\n\n\n<p>\u53c2\u6570\u5206\u4e3a\u4e09\u79cd\u7c7b\u578b<\/p>\n\n\n\n<p><strong>IN : \u4f5c\u4e3a\u8f93\u5165\uff0c\u9700\u8981\u8c03\u7528\u65f6\u4f20\u5165\u503c\uff08\u9ed8\u8ba4\uff09<\/strong>\n<strong>OUT\uff1a\u4f5c\u4e3a\u8f93\u51fa\uff0c\u53c2\u6570\u53ef\u4ee5\u4f5c\u4e3a\u8fd4\u56de\u503c<\/strong>\n<strong>INOUT\uff1a\u65e2\u53ef\u4ee5\u4f5c\u4e3a\u8f93\u5165\u53c2\u6570\uff0c\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u8f93\u51fa\u53c2\u6570<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>create procedure &#91;\u5b58\u50a8\u8fc7\u7a0b\u540d\u79f0](IN\/OUT\/INOUT &#91;\u53d8\u91cf\u540d] &#91;\u53d8\u91cf\u7c7b\u578b])\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u6761\u4ef6\u63a7\u5236\u8bed\u53e5\uff1a\">\u6761\u4ef6\u63a7\u5236\u8bed\u53e5\uff1a<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"if\u5224\u65ad\uff1a\">if\u5224\u65ad\uff1a<\/h4>\n\n\n\n<p>\u8bed\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>IF \u6761\u4ef61 THEN ...\nELSEIF \u6761\u4ef62 THEN ...\n...\nELSE ...\nEND IF;\n<\/code><\/pre>\n\n\n\n<p>\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>create procedure judging(in score int, out result varchar(4))\nbegin\n    if score &gt;= 85 then\n        set result := 'A';\n    elseif score&gt;=60 then\n        set result := 'B';\n    else\n        set result := 'C';\n    END IF;\nend;\n<\/code><\/pre>\n\n\n\n<p>\u4f7f\u7528\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>call judging(59 , @result);\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"case\uff1a\">case\uff1a<\/h4>\n\n\n\n<p>\u8bed\u6cd5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-- value == vx\u65f6 \u6267\u884c\u5bf9\u5e94\u4ee3\u7801\nCASE &#91;value]\n    WHEN &#91;v1] THEN ...\n    WHEN &#91;v2] THEN ...\n    ELSE ...\nEND CASE;\n-- \u8868\u8fbe\u5f0f\u6210\u7acb\u65f6\nCASE\n    WHEN &#91;\u8868\u8fbe\u5f0f1] THEN ...\n    WHEN &#91;\u8868\u8fbe\u5f0f2] THEN ...\n    ELSE ...\nEND CASE;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u5faa\u73af\u8bed\u53e5\uff1a\">\u5faa\u73af\u8bed\u53e5\uff1a<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"while\uff1a\">while\uff1a<\/h4>\n\n\n\n<p>\u5728\u4e00\u5f00\u59cb\u5c31\u8fdb\u884c\u5224\u65ad\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>WHILE &#91;\u8868\u8fbe\u5f0f] DO\n    ...\nEND WHILE;\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"repeat\uff1a\">repeat\uff1a<\/h4>\n\n\n\n<p>repeat\u5728\u6267\u884c\u5b8c\u903b\u8f91\uff0c\u5224\u65ad\u6ee1\u8db3\u6761\u4ef6\u65f6\uff0c\u624d\u9000\u51fa\u5faa\u73af\uff08\u81f3\u5c11\u6267\u884c\u4e00\u6b21\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>REPEAT\n    ...\n    UNTIL &#91;\u8868\u8fbe\u5f0f]\nEND REPEAT;\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"loop\uff1a\">loop\uff1a<\/h4>\n\n\n\n<p>\u5b9e\u73b0\u7b80\u5355\u7684\u5faa\u73af\uff0c\u9000\u51fa\u5faa\u73af\u9700\u8981\u81ea\u884c\u52a0\u5165 LEAVE \u6216\u8005 ITERATE\n\u9700\u8981\u5728\u9996\u4f4d\u6307\u5b9aloop\u7684label\u3002<\/p>\n\n\n\n<p>LEAVE \uff1a\u9000\u51fa\u5faa\u73af\uff08break\uff09\nITERATE \uff1a\u5f00\u59cb\u4e0b\u4e00\u6b21\u5faa\u73af\uff08continue\uff09<\/p>\n\n\n\n<p>\u8fd9\u4e24\u6761\u8bed\u53e5\u9700\u8981\u52a0\u5165\u5faa\u73af\u7684label\u6765\u63a7\u5236<\/p>\n\n\n\n<p>\u8bed\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;begin_label:] LOOP\n    ...\n    LEAVE &#91;label]\n    ITERATE &#91;label]\nEND LOOP &#91;end_label];\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u6e38\u6807\uff1a\">\u6e38\u6807\uff1a<\/h2>\n\n\n\n<p>\u6e38\u6807\uff08CURSOR) \u662f\u7528\u6765\u5b58\u50a8\u67e5\u8be2\u7ed3\u679c\u96c6\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5728\u5b58\u50a8\u8fc7\u7a0b\u548c\u51fd\u6570\u4e2d\u53ef\u4ee5\u4f7f\u7528\u6e38\u6807\u5bf9\u7ed3\u679c\u96c6\u8fdb\u884c<strong>\u5faa\u73af<\/strong>\u7684\u5904\u7406\u3002\u6e38\u6807\u7684\u4f7f\u7528\u5305\u62ec\u6e38\u6807\u7684\u58f0\u660e\u3001open\u3001fetch\u548cclose<\/p>\n\n\n\n<p>\u58f0\u660e\u6e38\u6807\u8981\u5728\u58f0\u660e\u666e\u901a\u53d8\u91cf\u4e4b\u540e\u3002\u5426\u5219\u4f1a\u62a5\u9519<\/p>\n\n\n\n<p>\u8bed\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-- \u58f0\u660e\u6e38\u6807 --\nDECLARE &#91;cursor_name] CURSOR FOR &#91;\u67e5\u8be2\u8bed\u53e5];\n-- \u6253\u5f00\u6e38\u6807 --\nOPEN &#91;cursor_name];\n-- \u83b7\u53d6\u6e38\u6807\u8bb0\u5f55 --\nFETCH &#91;cursor_name] INTO &#91;\u53d8\u91cf1],&#91;\u53d8\u91cf2];\n-- \u5173\u95ed\u6e38\u6807 --\nCLOSE &#91;cursor_name];\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u6761\u4ef6\u5904\u7406\u7a0b\u5e8f\uff1a\">\u6761\u4ef6\u5904\u7406\u7a0b\u5e8f\uff1a<\/h2>\n\n\n\n<p>\u6761\u4ef6\u5904\u7406\u7a0b\u5e8f\uff08Handler\uff09\u53ef\u4ee5\u7528\u6765\u5b9a\u4e49\u5e76\u81ea\u52a8\u6267\u884c\u5728\u6d41\u7a0b\u63a7\u5236\u7ed3\u6784\u6267\u884c\u8fc7\u7a0b\u4e2d\u9047\u5230\u5b9a\u4e49\u7684\u95ee\u9898\u65f6\u7684\u76f8\u5e94\u5904\u7406\u6b65\u9aa4\u3002<\/p>\n\n\n\n<p><strong>\u5728\u51fa\u73b0\u5bf9\u5e94SQL\u72b6\u6001\u65f6\uff0c\u4f1a\u81ea\u52a8\u6267\u884c\u3002<\/strong><\/p>\n\n\n\n<p>\u8bed\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DECLARE &#91;handler_action] HANDLER FOR &#91;condition_value] &#91;sqlstate_value];\n\n-- handler_action --\n    CONTINUE: \u7ee7\u7eed\u6267\u884c\u5f53\u524d\u7a0b\u5e8f\n    EXIT: \u7ec8\u6b62\u6267\u884c\u5f53\u524d\u7a0b\u5e8f\n-- condition_value --\n    SQLSTATE \uff1a\u72b6\u6001\u7801\uff08sqlstate_value\uff09\n    SQLWARNING\uff1a\u6240\u6709\u4ee501\u5f00\u5934\u7684sqlstate\u4ee3\u7801\u7b80\u5199\n    NOT FOUND\uff1a\u6240\u6709\u4ee502\u5f00\u5934\u7684sqlstate\u4ee3\u7801\u7b80\u5199\n    SQLEXCEPTION\uff1a\u5176\u4ed6sqlstate\u4ee3\u7801\u7b80\u5199\n<\/code><\/pre>\n\n\n\n<p>\u7528\u6765\u5904\u7406\u6b7b\u5faa\u73af\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>declare exit handler for sqlstate '02000' close u_cursor;\nwhile true do\n    fetch u_cursor into uname,ujob;\nend while;\n<\/code><\/pre>\n\n\n\n<p>\u53ef\u4ee5\u5728\u5b98\u65b9\u6587\u6863\u67e5\u627e\u6240\u6709 sql \u72b6\u6001\u7801\u7684\u5177\u4f53\u63cf\u8ff0\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\" id=\"\u5b58\u50a8\u51fd\u6570\uff1a\">\u5b58\u50a8\u51fd\u6570\uff1a<\/h1>\n\n\n\n<p>\u5b58\u50a8\u51fd\u6570\u662f\u6709\u8fd4\u56de\u503c\u7684\u5b58\u50a8\u8fc7\u7a0b\uff0c\u5b58\u50a8\u51fd\u6570\u7684\u53c2\u6570\u53ea\u80fd\u662fIN\u7c7b\u578b\u7684<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u8bed\u6cd5\uff1a\">\u8bed\u6cd5\uff1a<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE FUNCTION &#91;\u5b58\u50a8\u51fd\u6570\u540d\u79f0](&#91;\u53c2\u6570\u5217\u8868])\nRETURNS &#91;\u6570\u636e\u7c7b\u578b] &#91;characteristic]\nBEGIN\n    ...SQL\n    RETURN ...;\nEND;\n-- \u5fc5\u987b\u6307\u5b9a\u7684\u51fd\u6570\u7279\u6027 --\ncharacteristic:\n    DETERMINISTIC \u76f8\u540c\u7684\u8f93\u5165\u53c2\u6570\u603b\u662f\u4ea7\u751f\u76f8\u540c\u7684\u7ed3\u679c\n    NO SQL \u4e0d\u5305\u542bSQL\u8bed\u53e5\n    READS SQL DATA \u5305\u542b\u6570\u636e\u6570\u636e\u7684\u8bed\u53e5\uff0c\u4f46\u4e0d\u5305\u542b\u5199\u5165\u6570\u636e\u7684\u8bed\u53e5\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u4ecb\uff1a \u5728\u4e00\u4e2a\u4e1a\u52a1\u903b\u8f91\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u67e5\u8be2\u591a\u6b21\u6570\u636e\u5e93\uff08\u591a\u6b21\u7f51\u7edc\u8bf7\u6c42\uff09 \u53ef\u4ee5\u5c06\u591a\u6761SQL\u8bed\u53e5\u5c01\u88c5\u5728\u4e00\u4e2a\u96c6\u5408\u5f53\u4e2d\uff0c\u8c03\u7528 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[42,39],"tags":[],"class_list":["post-505","post","type-post","status-publish","format-standard","hentry","category-mysql","category-39"],"_links":{"self":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts\/505","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/comments?post=505"}],"version-history":[{"count":2,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts\/505\/revisions"}],"predecessor-version":[{"id":508,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/posts\/505\/revisions\/508"}],"wp:attachment":[{"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/media?parent=505"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/categories?post=505"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/forelink.top\/index.php\/wp-json\/wp\/v2\/tags?post=505"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}