{"id":865,"date":"2025-02-18T18:49:48","date_gmt":"2025-02-18T10:49:48","guid":{"rendered":"https:\/\/eve2333.top\/?p=865"},"modified":"2025-02-18T18:49:48","modified_gmt":"2025-02-18T10:49:48","slug":"mysql%e6%95%b0%e6%8d%ae%e5%ba%93%e5%85%a5%e9%97%a8%e5%88%b0%e5%a4%a7%e8%9b%87%e5%b0%9a%e7%a1%85%e8%b0%b7%e5%ae%8b%e7%ba%a2%e5%ba%b7%e8%80%81%e5%b8%88%e7%ac%94%e8%ae%b0-%e5%9f%ba%e7%a1%80%e7%af%87-p-11","status":"publish","type":"post","link":"https:\/\/eve2333.top\/?p=865","title":{"rendered":"MySQL\u6570\u636e\u5e93\u5165\u95e8\u5230\u5927\u86c7\u5c1a\u7845\u8c37\u5b8b\u7ea2\u5eb7\u8001\u5e08\u7b14\u8bb0 \u57fa\u7840\u7bc7 part 15"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">&nbsp;\u7b2c15\u7ae0_\u5b58\u50a8\u8fc7\u7a0b\u4e0e\u51fd\u6570<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">1. \u5b58\u50a8\u8fc7\u7a0b\u6982\u8ff0<\/h2>\n\n\n\n<p>\u5b58\u50a8\u8fc7\u7a0b\u7684\u82f1\u6587\u662f Stored Procedure \u3002\u5b83\u7684\u601d\u60f3\u5f88\u7b80\u5355\uff0c\u5c31\u662f\u4e00\u7ec4\u7ecf\u8fc7\u9884\u5148\u7f16\u8bd1\u7684 SQL \u8bed\u53e5\u7684\u5c01\u88c5<\/p>\n\n\n\n<p>\u6267\u884c\u8fc7\u7a0b\uff1a\u5b58\u50a8\u8fc7\u7a0b\u9884\u5148\u5b58\u50a8\u5728 MySQL \u670d\u52a1\u5668\u4e0a\uff0c\u9700\u8981\u6267\u884c\u7684\u65f6\u5019\uff0c\u5ba2\u6237\u7aef\u53ea\u9700\u8981\u5411\u670d\u52a1\u5668\u7aef\u53d1\u51fa\u8c03\u7528 \u5b58\u50a8\u8fc7\u7a0b\u7684\u547d\u4ee4\uff0c\u670d\u52a1\u5668\u7aef\u5c31\u53ef\u4ee5\u628a\u9884\u5148\u5b58\u50a8\u597d\u7684\u8fd9\u4e00\u7cfb\u5217 SQL \u8bed\u53e5\u5168\u90e8\u6267\u884c\u3002<\/p>\n\n\n\n<p>\u597d\u5904\uff1a<br>1\u3001\u7b80\u5316\u64cd\u4f5c\uff0c\u63d0\u9ad8\u4e86sql\u8bed\u53e5\u7684\u91cd\u7528\u6027\uff0c\u51cf\u5c11\u4e86\u5f00\u53d1\u7a0b\u5e8f\u5458\u7684\u538b\u529b<br>2\u3001\u51cf\u5c11\u64cd\u4f5c\u8fc7\u7a0b\u4e2d\u7684\u5931\u8bef\uff0c\u63d0\u9ad8\u6548\u7387<br>3\u3001\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u91cf\uff08\u5ba2\u6237\u7aef\u4e0d\u9700\u8981\u628a\u6240\u6709\u7684 SQL \u8bed\u53e5\u901a\u8fc7\u7f51\u7edc\u53d1\u7ed9\u670d\u52a1\u5668\uff09<br>4\u3001\u51cf\u5c11\u4e86 SQL \u8bed\u53e5\u66b4\u9732\u5728 \u7f51\u4e0a\u7684\u98ce\u9669\uff0c\u4e5f\u63d0\u9ad8\u4e86\u6570\u636e\u67e5\u8be2\u7684\u5b89\u5168\u6027<\/p>\n\n\n\n<p>\u548c\u89c6\u56fe\u3001\u51fd\u6570\u7684\u5bf9\u6bd4\uff1a \u5b83\u548c\u89c6\u56fe\u6709\u7740\u540c\u6837\u7684\u4f18\u70b9\uff0c\u6e05\u6670\u3001\u5b89\u5168\uff0c\u8fd8\u53ef\u4ee5\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u91cf\u3002\u4e0d\u8fc7\u5b83\u548c\u89c6\u56fe\u4e0d\u540c\uff0c\u89c6\u56fe\u662f \u865a\u62df\u8868\uff0c \u901a\u5e38\u4e0d\u5bf9\u5e95\u5c42\u6570\u636e\u8868\u76f4\u63a5\u64cd\u4f5c\uff0c\u800c\u5b58\u50a8\u8fc7\u7a0b\u662f\u7a0b\u5e8f\u5316\u7684 SQL\uff0c\u53ef\u4ee5 \u76f4\u63a5\u64cd\u4f5c\u5e95\u5c42\u6570\u636e\u8868\uff0c\u76f8\u6bd4\u4e8e\u9762\u5411\u96c6 \u5408\u7684\u64cd\u4f5c\u65b9\u5f0f\uff0c\u80fd\u591f\u5b9e\u73b0\u4e00\u4e9b\u66f4\u590d\u6742\u7684\u6570\u636e\u5904\u7406\u3002 \u4e00\u65e6\u5b58\u50a8\u8fc7\u7a0b\u88ab\u521b\u5efa\u51fa\u6765\uff0c\u4f7f\u7528\u5b83\u5c31\u50cf\u4f7f\u7528\u51fd\u6570\u4e00\u6837\u7b80\u5355\uff0c\u6211\u4eec\u76f4\u63a5\u901a\u8fc7\u8c03\u7528\u5b58\u50a8\u8fc7\u7a0b\u540d\u5373\u53ef\u3002\u76f8\u8f83\u4e8e \u51fd\u6570\uff0c\u5b58\u50a8\u8fc7\u7a0b\u662f \u6ca1\u6709\u8fd4\u56de\u503c\u7684\u3002<\/p>\n\n\n\n<p>2.1 \u8bed\u6cd5\u5206\u6790<\/p>\n\n\n\n<p>\u8bed\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE PROCEDURE \u5b58\u50a8\u8fc7\u7a0b\u540d(IN|OUT|INOUT \u53c2\u6570\u540d \u53c2\u6570\u7c7b\u578b, ...)<\/code><\/pre>\n\n\n<p>[characteristics ...]<\/p>\n\n\n\n<p>BEGIN &nbsp; &nbsp; \u5b58\u50a8\u8fc7\u7a0b\u4f53 END<\/p>\n\n\n\n<p>\u7c7b\u4f3c\u4e8e Java \u4e2d\u7684\u65b9\u6cd5\uff1a<br>\u4fee\u9970\u7b26 \u8fd4\u56de\u7c7b\u578b \u65b9\u6cd5\u540d(\u53c2\u6570\u7c7b\u578b \u53c2\u6570\u540d, ...) {<br>&nbsp; &nbsp; \u65b9\u6cd5\u4f53;<br>}<\/p>\n\n\n\n<p>\u8bf4\u660e\uff1a<br>1\u3001\u53c2\u6570\u524d\u9762\u7684\u7b26\u53f7\u7684\u610f\u601d<br>&nbsp; &nbsp;- IN\uff1a\u5f53\u524d\u53c2\u6570\u4e3a\u8f93\u5165\u53c2\u6570\uff0c\u4e5f\u5c31\u662f\u8868\u793a\u5165\u53c2\uff1b<br>&nbsp; &nbsp; &nbsp;\u5b58\u50a8\u8fc7\u7a0b\u53ea\u662f\u8bfb\u53d6\u8fd9\u4e2a\u53c2\u6570\u7684\u503c\u3002\u5982\u679c\u6ca1\u6709\u5b9a\u4e49\u53c2\u6570\u79cd\u7c7b\uff0c\u9ed8\u8ba4\u5c31\u662f IN\uff0c\u8868\u793a\u8f93\u5165\u53c2\u6570\u3002<br>&nbsp; &nbsp;- OUT\uff1a\u5f53\u524d\u53c2\u6570\u4e3a\u8f93\u51fa\u53c2\u6570\uff0c\u4e5f\u5c31\u662f\u8868\u793a\u51fa\u53c2\uff1b<br>&nbsp; &nbsp; &nbsp;\u6267\u884c\u5b8c\u6210\u4e4b\u540e\uff0c\u8c03\u7528\u8fd9\u4e2a\u5b58\u50a8\u8fc7\u7a0b\u7684\u5ba2\u6237\u7aef\u6216\u8005\u5e94\u7528\u7a0b\u5e8f\u5c31\u53ef\u4ee5\u8bfb\u53d6\u8fd9\u4e2a\u53c2\u6570\u8fd4\u56de\u7684\u503c\u4e86\u3002<br>&nbsp; &nbsp;- INOUT\uff1a\u5f53\u524d\u53c2\u6570\u65e2\u53ef\u4ee5\u4e3a\u8f93\u5165\u53c2\u6570\uff0c\u4e5f\u53ef\u4ee5\u4e3a\u8f93\u51fa\u53c2\u6570\u3002<\/p>\n\n\n\n<p>2\u3001\u5f62\u53c2\u7c7b\u578b\u53ef\u4ee5\u662f MySQL \u6570\u636e\u5e93\u4e2d\u7684\u4efb\u610f\u7c7b\u578b\u3002<\/p>\n\n\n\n<p>3\u3001characteristics \u8868\u793a\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0b\u65f6\u6307\u5b9a\u7684\u5bf9\u5b58\u50a8\u8fc7\u7a0b\u7684\u7ea6\u675f\u6761\u4ef6\uff0c\u5176\u53d6\u503c\u4fe1\u606f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>LANGUAGE SQL\n&#91;NOT] DETERMINISTIC\n{ CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }\nSQL SECURITY { DEFINER | INVOKER }\nCOMMENT 'string'<\/code><\/pre>\n\n\n\n<p>- LANGUAGE SQL\uff1a\u8bf4\u660e\u5b58\u50a8\u8fc7\u7a0b\u6267\u884c\u4f53\u662f\u7531 SQL \u8bed\u53e5\u7ec4\u6210\u7684\uff0c\u5f53\u524d\u7cfb\u7edf\u652f\u6301\u7684\u8bed\u8a00\u4e3a SQL\u3002<br>- [NOT] DETERMINISTIC\uff1a\u6307\u660e\u5b58\u50a8\u8fc7\u7a0b\u6267\u884c\u7684\u7ed3\u679c\u662f\u5426\u786e\u5b9a\u3002DETERMINISTIC \u8868\u793a\u7ed3\u679c\u662f\u786e\u5b9a\u7684\uff0c\u6bcf\u6b21\u6267\u884c\u5b58\u50a8\u8fc7\u7a0b\u65f6\uff0c\u76f8\u540c\u7684\u8f93\u5165\u4f1a\u5f97\u5230\u76f8\u540c\u7684\u8f93\u51fa\u3002NOT DETERMINISTIC \u8868\u793a\u7ed3\u679c\u662f\u4e0d\u786e\u5b9a\u7684\uff0c\u76f8\u540c\u7684\u8f93\u5165\u53ef\u80fd\u5f97\u5230\u4e0d\u540c\u7684\u8f93\u51fa\u3002\u5982\u679c\u6ca1\u6709\u6307\u5b9a\u4efb\u610f\u4e00\u4e2a\u503c\uff0c\u9ed8\u8ba4\u4e3a NOT DETERMINISTIC\u3002<br>- { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }\uff1a\u6307\u660e\u5b50\u7a0b\u5e8f\u4f7f\u7528 SQL \u8bed\u53e5\u7684\u9650\u5236\u3002<br>&nbsp; - CONTAINS SQL \u8868\u793a\u5f53\u524d\u5b58\u50a8\u8fc7\u7a0b\u7684\u5b50\u7a0b\u5e8f\u5305\u542b SQL \u8bed\u53e5\uff0c\u4f46\u662f\u5e76\u4e0d\u5305\u542b\u8bfb\u6570\u636e\u7684 SQL \u8bed\u53e5\uff1b<br>&nbsp; - NO SQL \u8868\u793a\u5f53\u524d\u5b58\u50a8\u8fc7\u7a0b\u7684\u5b50\u7a0b\u5e8f\u4e2d\u4e0d\u5305\u542b\u4efb\u4f55 SQL \u8bed\u53e5\uff1b<br>&nbsp; - READS SQL DATA \u8868\u793a\u5f53\u524d\u5b58\u50a8\u8fc7\u7a0b\u7684\u5b50\u7a0b\u5e8f\u4e2d\u5305\u542b\u8bfb\u6570\u636e\u7684 SQL \u8bed\u53e5\uff1b<br>&nbsp; - MODIFIES SQL DATA \u8868\u793a\u5f53\u524d\u5b58\u50a8\u8fc7\u7a0b\u7684\u5b50\u7a0b\u5e8f\u4e2d\u5305\u542b\u5199\u6570\u636e\u7684 SQL \u8bed\u53e5\u3002<br>&nbsp; - \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u7cfb\u7edf\u4f1a\u6307\u5b9a\u4e3a CONTAINS SQL\u3002<br>- SQL SECURITY { DEFINER | INVOKER }\uff1a\u6267\u884c\u5f53\u524d\u5b58\u50a8\u8fc7\u7a0b\u7684\u6743\u9650\uff0c\u5373\u6307\u660e\u54ea\u4e9b\u7528\u6237\u80fd\u591f\u6267\u884c\u5f53\u524d\u5b58\u50a8\u8fc7\u7a0b\u3002<br>&nbsp; - DEFINER \u8868\u793a\u53ea\u6709\u5f53\u524d\u5b58\u50a8\u8fc7\u7a0b\u7684\u521b\u5efa\u8005\u6216\u8005\u5b9a\u4e49\u8005\u624d\u80fd\u6267\u884c\u5f53\u524d\u5b58\u50a8\u8fc7\u7a0b\uff1b<br>&nbsp; - INVOKER \u8868\u793a\u62e5\u6709\u5f53\u524d\u5b58\u50a8\u8fc7\u7a0b\u7684\u8bbf\u95ee\u6743\u9650\u7684\u7528\u6237\u80fd\u591f\u6267\u884c\u5f53\u524d\u5b58\u50a8\u8fc7\u7a0b\u3002<br>&nbsp; - \u5982\u679c\u6ca1\u6709\u8bbe\u7f6e\u76f8\u5173\u7684\u503c\uff0c\u5219 MySQL \u9ed8\u8ba4\u6307\u5b9a\u503c\u4e3a DEFINER\u3002<br>&nbsp; -&nbsp;COMMENT 'string' \uff1a\u6ce8\u91ca\u4fe1\u606f\uff0c\u53ef\u4ee5\u7528\u6765\u63cf\u8ff0\u5b58\u50a8\u8fc7\u7a0b\u3002<\/p>\n\n\n\n<p>4\u3001\u5b58\u50a8\u8fc7\u7a0b\u4f53\u4e2d\u53ef\u4ee5\u6709\u591a\u6761 SQL \u8bed\u53e5\uff0c\u5982\u679c\u4ec5\u4ec5\u4e00\u6761SQL \u8bed\u53e5\uff0c\u5219\u53ef\u4ee5\u7701\u7565 BEGIN \u548c END \u7f16\u5199\u5b58\u50a8\u8fc7\u7a0b\u5e76\u4e0d\u662f\u4e00\u4ef6\u7b80\u5355\u7684\u4e8b\u60c5\uff0c\u53ef\u80fd\u5b58\u50a8\u8fc7\u7a0b\u4e2d\u9700\u8981\u590d\u6742\u7684 SQL \u8bed\u53e5\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1. BEGIN\u2026END\uff1aBEGIN\u2026END \u4e2d\u95f4\u5305\u542b\u4e86\u591a\u4e2a\u8bed\u53e5\uff0c\u6bcf\u4e2a\u8bed\u53e5\u90fd\u4ee5\uff08;\uff09\u53f7\u4e3a\u7ed3\u675f\u7b26\u3002<\/li>\n\n\n\n<li>2. DECLARE\uff1aDECLARE \u7528\u6765\u58f0\u660e\u53d8\u91cf\uff0c\u4f7f\u7528\u7684\u4f4d\u7f6e\u5728\u4e8e BEGIN\u2026END \u8bed\u53e5\u4e2d\u95f4\uff0c\u800c\u4e14\u9700\u8981\u5728\u5176\u4ed6\u8bed\u53e5\u4f7f\u7528\u4e4b\u524d\u8fdb \u884c\u53d8\u91cf\u7684\u58f0\u660e\u3002<\/li>\n\n\n\n<li>3. SET\uff1a\u8d4b\u503c\u8bed\u53e5\uff0c\u7528\u4e8e\u5bf9\u53d8\u91cf\u8fdb\u884c\u8d4b\u503c\u3002<\/li>\n\n\n\n<li>4. SELECT\u2026 INTO\uff1a\u628a\u4ece\u6570\u636e\u8868\u4e2d\u67e5\u8be2\u7684\u7ed3\u679c\u5b58\u653e\u5230\u53d8\u91cf\u4e2d\uff0c\u4e5f\u5c31\u662f\u4e3a\u53d8\u91cf\u8d4b\u503c\u3002<\/li>\n\n\n\n<li>5\u3001\u9700\u8981\u8bbe\u7f6e\u65b0\u7684\u7ed3\u675f\u6807\u8bb0<br>DELIMITER \u65b0\u7684\u7ed3\u675f\u6807\u8bb0<\/li>\n<\/ul>\n\n\n\n<p>\u56e0\u4e3aMySQL\u9ed8\u8ba4\u7684\u8bed\u53e5\u7ed3\u675f\u7b26\u53f7\u4e3a\u5206\u53f7\u2018;\u2019\u3002\u4e3a\u4e86\u907f\u514d\u4e0e\u5b58\u50a8\u8fc7\u7a0b\u4e2dSQL\u8bed\u53e5\u7ed3\u675f\u7b26\u76f8\u51b2\u7a81\uff0c\u9700\u8981\u4f7f\u7528 DELIMITER\u6539\u53d8\u5b58\u50a8\u8fc7\u7a0b\u7684\u7ed3\u675f\u7b26\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\uff1a\u201cDELIMITER \/\/\u201d\u8bed\u53e5\u7684\u4f5c\u7528\u662f\u5c06MySQL\u7684\u7ed3\u675f\u7b26\u8bbe\u7f6e\u4e3a\/\/\uff0c\u5e76\u4ee5\u201cEND \/\/\u201d\u7ed3\u675f\u5b58\u50a8\u8fc7\u7a0b\u3002\u5b58\u50a8\u8fc7\u7a0b\u5b9a \u4e49\u5b8c\u6bd5\u4e4b\u540e\u518d\u4f7f\u7528\u201cDELIMITER ;\u201d\u6062\u590d\u9ed8\u8ba4\u7ed3\u675f\u7b26\u3002DELIMITER\u4e5f\u53ef\u4ee5\u6307\u5b9a\u5176\u4ed6\u7b26\u53f7\u4f5c\u4e3a\u7ed3\u675f\u7b26\u3002<\/p>\n\n\n\n<p>\u5f53\u4f7f\u7528DELIMITER\u547d\u4ee4\u65f6\uff0c\u5e94\u8be5\u907f\u514d\u4f7f\u7528\u53cd\u659c\u6760\uff08\u2018\\\u2019\uff09\u5b57\u7b26\uff0c\u56e0\u4e3a\u53cd\u659c\u7ebf\u662fMySQL\u7684\u8f6c\u4e49\u5b57\u7b26\u3002&nbsp;<\/p>\n\n\n\n<p><a href=\"https:\/\/www.bilibili.com\/video\/BV1iq4y1u7vj\/?spm_id_from=333.788.player.switch&amp;vd_source=b31958e33027799323b8b7d77ae181d4&amp;p=79\" target=\"_blank\"  rel=\"nofollow\" >79-\u5b58\u50a8\u8fc7\u7a0b\u7684\u521b\u5efa\u4e0e\u8c03\u7528_\u54d4\u54e9\u54d4\u54e9_bilibili<\/a><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DELIMITER $\n\nCREATE PROCEDURE \u5b58\u50a8\u8fc7\u7a0b\u540d(IN|OUT|INOUT \u53c2\u6570\u540d \u53c2\u6570\u7c7b\u578b, ... )<\/code><\/pre>\n\n\n<p>[characteristics ...]<\/p>\n\n\n\n<p>BEGIN sql\u8bed\u53e51; sql\u8bed\u53e52; END $<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#\u7b2c15\u7ae0_\u5b58\u50a8\u8fc7\u7a0b\u4e0e\u5b58\u50a8\u51fd\u6570\n\n#0.\u51c6\u5907\u5de5\u4f5c\n\nCREATE DATABASE dbtest15;\n\nUSE dbtest15;\n\nCREATE TABLE employees\nAS\nSELECT * \nFROM atguigudb.`employees`;\n\nCREATE TABLE departments\nAS\nSELECT * FROM atguigudb.`departments`;\n\nSELECT * FROM employees;\n\nSELECT * FROM departments;\n\n#1. \u521b\u5efa\u5b58\u50a8\u8fc7\u7a0b\n\n#\u7c7b\u578b1\uff1a\u65e0\u53c2\u6570\u65e0\u8fd4\u56de\u503c\n\n#\u4e3e\u4f8b1\uff1a\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0bselect_all_data()\uff0c\u67e5\u770b employees \u8868\u7684\u6240\u6709\u6570\u636e\n\nDELIMITER $\n\nCREATE PROCEDURE select_all_data()\nBEGIN\n\tSELECT * FROM employees;\nEND $\n\nDELIMITER ;<\/code><\/pre>\n\n\n\n<p>\u5c31\u975e\u5e38\u7edd\u671b\uff0cnavicat\u4e0d\u9700\u8981delimiter\uff0c\u800c\u4e14delimite\u4e0d\u80fd\u81ea\u52a8\u8865\u5168<br>\u5982\u679c\u7528\u7684\u662fdbeaver\uff0c\u8981\u7528\u6267\u884c\u811a\u672c\u7684\u65b9\u5f0f\u6765\u6267\u884c\uff0c\u5feb\u6377\u952ealt+x<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#2. \u5b58\u50a8\u8fc7\u7a0b\u7684\u8c03\u7528\n\nCALL select_all_data();\n\n#\u4e3e\u4f8b2\uff1a\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0bavg_employee_salary()\uff0c\u8fd4\u56de\u6240\u6709\u5458\u5de5\u7684\u5e73\u5747\u5de5\u8d44\n\nDELIMITER \/\/\n\nCREATE PROCEDURE avg_employee_salary()\nBEGIN \n\tSELECT AVG(salary) FROM employees;\n\t\nEND \/\/\n\nDELIMITER ;\n\n#\u8c03\u7528\nCALL avg_employee_salary();\n\n\n#\u4e3e\u4f8b3\uff1a\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0bshow_max_salary()\uff0c\u7528\u6765\u67e5\u770b\u201cemps\u201d\u8868\u7684\u6700\u9ad8\u85aa\u8d44\u503c\u3002\n\nDELIMITER \/\/\n\nCREATE PROCEDURE show_max_salary()\nBEGIN\n\tSELECT MAX(salary)\n\tFROM employees;\nEND \/\/\n\nDELIMITER ;\n\n#\u8c03\u7528\nCALL show_max_salary();\n\n#\u7c7b\u578b2\uff1a\u5e26 OUT\n#\u4e3e\u4f8b4\uff1a\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0bshow_min_salary()\uff0c\u67e5\u770b\u201cemps\u201d\u8868\u7684\u6700\u4f4e\u85aa\u8d44\u503c\u3002\u5e76\u5c06\u6700\u4f4e\u85aa\u8d44\n#\u901a\u8fc7OUT\u53c2\u6570\u201cms\u201d\u8f93\u51fa\n\nDESC employees;\n\nDELIMITER \/\/\n\nCREATE PROCEDURE show_min_salary(OUT ms DOUBLE)\nBEGIN\n\tSELECT MIN(salary) INTO ms\n\tFROM employees;\nEND \/\/\n\nDELIMITER ;\n\n#\u8c03\u7528\n\nCALL show_min_salary(@ms);\n\n#\u67e5\u770b\u53d8\u91cf\u503c\nSELECT @ms;\n\n#\u7c7b\u578b3\uff1a\u5e26 IN\n#\u4e3e\u4f8b5\uff1a\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0bshow_someone_salary()\uff0c\u67e5\u770b\u201cemps\u201d\u8868\u7684\u67d0\u4e2a\u5458\u5de5\u7684\u85aa\u8d44\uff0c\n#\u5e76\u7528IN\u53c2\u6570empname\u8f93\u5165\u5458\u5de5\u59d3\u540d\u3002\n\nDELIMITER \/\/\n\nCREATE PROCEDURE show_someone_salary(IN empname VARCHAR(20))\nBEGIN\n\tSELECT salary FROM employees\n\tWHERE last_name = empname;\nEND \/\/\n\nDELIMITER ;\n\n#\u8c03\u7528\u65b9\u5f0f1\nCALL show_someone_salary('Abel');\n#\u8c03\u7528\u65b9\u5f0f2\nSET @empname := 'Abel';\nCALL show_someone_salary(@empname);\n\n#\u591a\u4e86\u4e00\u6b65\u662f\u4e3a\u4e86\u4e0d\u5199\u6b7b\u554a\uff0c\u4ee5\u540e\u5199\u7a0b\u5e8f\u53ef\u4ee5\u8ba9\u7528\u6237\u8f93\u5165\n\n\nSELECT * FROM employees WHERE last_name = 'Abel';\n\n#\u7c7b\u578b4\uff1a\u5e26 IN \u548c OUT\n#\u4e3e\u4f8b6\uff1a\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0bshow_someone_salary2()\uff0c\u67e5\u770b\u201cemps\u201d\u8868\u7684\u67d0\u4e2a\u5458\u5de5\u7684\u85aa\u8d44\uff0c\n#\u5e76\u7528IN\u53c2\u6570empname\u8f93\u5165\u5458\u5de5\u59d3\u540d\uff0c\u7528OUT\u53c2\u6570empsalary\u8f93\u51fa\u5458\u5de5\u85aa\u8d44\u3002\n\nDELIMITER \/\/\n\nCREATE PROCEDURE show_someone_salary2(IN empname VARCHAR(20),OUT empsalary DECIMAL(10,2))\nBEGIN\n\tSELECT salary INTO empsalary\n\tFROM employees\n\tWHERE last_name = empname;\nEND \/\/\n\nDELIMITER ;\n\n#\u8c03\u7528\nSET @empname = 'Abel';\nCALL show_someone_salary2(@empname,@empsalary);\n\nSELECT @empsalary;\n\n\n#\u7c7b\u578b5\uff1a\u5e26 INOUT\n#\u4e3e\u4f8b7\uff1a\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0bshow_mgr_name()\uff0c\u67e5\u8be2\u67d0\u4e2a\u5458\u5de5\u9886\u5bfc\u7684\u59d3\u540d\uff0c\u5e76\u7528INOUT\u53c2\u6570\u201cempname\u201d\u8f93\u5165\u5458\u5de5\u59d3\u540d\uff0c\n#\u8f93\u51fa\u9886\u5bfc\u7684\u59d3\u540d\u3002\n\nDESC employees;\n\nDELIMITER $\n\nCREATE PROCEDURE show_mgr_name(INOUT empname VARCHAR(25))\nBEGIN\n\n\tSELECT last_name INTO empname\n\tFROM employees\n\tWHERE employee_id = (\n\t\t\t\tSELECT manager_id\n\t\t\t\tFROM employees\n\t\t\t\tWHERE last_name = empname\n\t\t\t\t);\n\t\nEND $\n\nDELIMITER ;\n\n#\u8c03\u7528\nSET @empname := 'Abel';\nCALL show_mgr_name(@empname);\n\nSELECT @empname;\n\n<\/code><\/pre>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"625\" width=\"730\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/38f8f3f27d774750bfe0df56fe446f37.png\" alt=\"\"><img loading=\"lazy\" decoding=\"async\" height=\"1199\" width=\"717\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/e4b940577c444906bc64f9679645b35f.png\" alt=\"\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b58\u50a8\u51fd\u6570&nbsp;<\/h2>\n\n\n\n<p>\u524d\u9762\u5b66\u4e60\u4e86\u5f88\u591a\u51fd\u6570\uff0c\u4f7f\u7528\u8fd9\u4e9b\u51fd\u6570\u53ef\u4ee5\u5bf9\u6570\u636e\u8fdb\u884c\u7684\u5404\u79cd\u5904\u7406\u64cd\u4f5c\uff0c\u6781\u5927\u5730\u63d0\u9ad8\u7528\u6237\u5bf9\u6570\u636e\u5e93\u7684\u7ba1\u7406 \u6548\u7387\u3002MySQL\u652f\u6301\u81ea\u5b9a\u4e49\u51fd\u6570\uff0c\u5b9a\u4e49\u597d\u4e4b\u540e\uff0c\u8c03\u7528\u65b9\u5f0f\u4e0e\u8c03\u7528MySQL\u9884\u5b9a\u4e49\u7684\u7cfb\u7edf\u51fd\u6570\u4e00\u6837\u3002<\/p>\n\n\n\n<p>\u8bed\u6cd5\u5206\u6790 \u5b66\u8fc7\u7684\u51fd\u6570\uff1aLENGTH\u3001SUBSTR\u3001CONCAT\u7b49 \u8bed\u6cd5\u683c\u5f0f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE FUNCTION \u51fd\u6570\u540d(\u53c2\u6570\u540d \u53c2\u6570\u7c7b\u578b,...) \nRETURNS \u8fd4\u56de\u503c\u7c7b\u578b<\/code><\/pre>\n\n\n<p>[characteristics ...]<\/p>\n\n\n\n<p>BEGIN \u51fd\u6570\u4f53 #\u51fd\u6570\u4f53\u4e2d\u80af\u5b9a\u6709 RETURN \u8bed\u53e5 END<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1\u3001\u53c2\u6570\u5217\u8868\uff1a\u6307\u5b9a\u53c2\u6570\u4e3aIN\u3001OUT\u6216INOUT\u53ea\u5bf9PROCEDURE\u662f\u5408\u6cd5\u7684\uff0cFUNCTION\u4e2d\u603b\u662f\u9ed8\u8ba4\u4e3aIN\u53c2 \u6570\u3002<\/li>\n\n\n\n<li>2\u3001RETURNS type \u8bed\u53e5\u8868\u793a\u51fd\u6570\u8fd4\u56de\u6570\u636e\u7684\u7c7b\u578b\uff1b RETURNS\u5b50\u53e5\u53ea\u80fd\u5bf9FUNCTION\u505a\u6307\u5b9a\uff0c\u5bf9\u51fd\u6570\u800c\u8a00\u8fd9\u662f \u6570\u4f53\u5fc5\u987b\u5305\u542b\u4e00\u4e2a RETURN value \u8bed\u53e5\u3002 \u5f3a\u5236\u7684\u3002\u5b83\u7528\u6765\u6307\u5b9a\u51fd\u6570\u7684\u8fd4\u56de\u7c7b\u578b\uff0c\u800c\u4e14\u51fd<\/li>\n\n\n\n<li>3\u3001characteristic \u521b\u5efa\u51fd\u6570\u65f6\u6307\u5b9a\u7684\u5bf9\u51fd\u6570\u7684\u7ea6\u675f\u3002\u53d6\u503c\u4e0e\u521b\u5efa\u5b58\u50a8\u8fc7\u7a0b\u65f6\u76f8\u540c\uff0c\u8fd9\u91cc\u4e0d\u518d\u8d58\u8ff0\u3002<\/li>\n\n\n\n<li>4\u3001\u51fd\u6570\u4f53\u4e5f\u53ef\u4ee5\u7528BEGIN\u2026END\u6765\u8868\u793aSQL\u4ee3\u7801\u7684\u5f00\u59cb\u548c\u7ed3\u675f\u3002\u5982\u679c\u51fd\u6570\u4f53\u53ea\u6709\u4e00\u6761\u8bed\u53e5\uff0c\u4e5f\u53ef\u4ee5\u7701\u7565 BEGIN\u2026END\u3002\u00a0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">&nbsp;4.2 \u8c03\u7528\u5b58\u50a8\u51fd\u6570<\/h3>\n\n\n\n<p>\u5728MySQL\u4e2d\uff0c\u5b58\u50a8\u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5\u4e0eMySQL\u5185\u90e8\u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5\u662f\u4e00\u6837\u7684\u3002\u6362\u8a00\u4e4b\uff0c\u7528\u6237\u81ea\u5df1\u5b9a\u4e49\u7684\u5b58 \u50a8\u51fd\u6570\u4e0eMySQL\u5185\u90e8\u51fd\u6570\u662f\u4e00\u4e2a\u6027\u8d28\u7684\u3002\u533a\u522b\u5728\u4e8e\uff0c\u5b58\u50a8\u51fd\u6570\u662f \u7528\u6237\u81ea\u5df1\u5b9a\u4e49\u7684\uff0c\u800c\u5185\u90e8\u51fd\u6570\u662fMySQL \u7684\u5f00\u53d1 \u8005\u5b9a\u4e49\u7684\u3002<\/p>\n\n\n\n<p><strong>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;SELECT \u51fd\u6570\u540d(\u5b9e\u53c2\u5217\u8868)<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u82e5\u5728\u521b\u5efa\u5b58\u50a8\u51fd\u6570\u4e2d\u62a5\u9519\u201c you might want to use the less safe log_bin_trust_function_creators variable \u201d\uff0c\u6709\u4e24\u79cd\u5904\u7406\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<p>\u65b9\u5f0f1\uff1a\u52a0\u4e0a\u5fc5\u8981\u7684\u51fd\u6570\u7279\u6027\u201c[NOT] DETERMINISTIC\u201d\u548c\u201c{CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA}\u201d<\/p>\n\n\n\n<p>\u65b9\u5f0f2\uff1a mysql&gt; SET GLOBAL log_bin_trust_function_creators = 1;<\/p>\n<\/blockquote>\n\n\n\n<pre class=\"wp-block-code\"><code>#2.\u5b58\u50a8\u51fd\u6570\n\n# \u4e3e\u4f8b1\uff1a\u521b\u5efa\u5b58\u50a8\u51fd\u6570\uff0c\u540d\u79f0\u4e3aemail_by_name()\uff0c\u53c2\u6570\u5b9a\u4e49\u4e3a\u7a7a\uff0c\n#\u8be5\u51fd\u6570\u67e5\u8be2Abel\u7684email\uff0c\u5e76\u8fd4\u56de\uff0c\u6570\u636e\u7c7b\u578b\u4e3a\u5b57\u7b26\u4e32\u578b\u3002\n\nDELIMITER \/\/\n\nCREATE FUNCTION email_by_name()\nRETURNS VARCHAR(25)\n\tDETERMINISTIC\n\tCONTAINS SQL\n\tREADS SQL DATA\nBEGIN\n\tRETURN (SELECT email FROM employees WHERE last_name = 'Abel');\nEND \/\/\n\nDELIMITER ;\n\n#\u8c03\u7528\nSELECT email_by_name();\n\nSELECT email,last_name FROM employees WHERE last_name = 'Abel';\n\n#\u4e3e\u4f8b2\uff1a\u521b\u5efa\u5b58\u50a8\u51fd\u6570\uff0c\u540d\u79f0\u4e3aemail_by_id()\uff0c\u53c2\u6570\u4f20\u5165emp_id\uff0c\u8be5\u51fd\u6570\u67e5\u8be2emp_id\u7684email\uff0c\n#\u5e76\u8fd4\u56de\uff0c\u6570\u636e\u7c7b\u578b\u4e3a\u5b57\u7b26\u4e32\u578b\u3002\n\n#\u521b\u5efa\u51fd\u6570\u524d\u6267\u884c\u6b64\u8bed\u53e5\uff0c\u4fdd\u8bc1\u51fd\u6570\u7684\u521b\u5efa\u4f1a\u6210\u529f\nSET GLOBAL log_bin_trust_function_creators = 1;\n\n#\u58f0\u660e\u51fd\u6570\n\nDELIMITER \/\/\n\nCREATE FUNCTION email_by_id(emp_id INT)\nRETURNS VARCHAR(25)\n\nBEGIN\n\tRETURN (SELECT email FROM employees WHERE employee_id = emp_id);\n\nEND \/\/\n\nDELIMITER ;\n\n\n#\u8c03\u7528\nSELECT email_by_id(101);\n\nSET @emp_id := 102;\nSELECT email_by_id(@emp_id);\n\n\n#\u4e3e\u4f8b3\uff1a\u521b\u5efa\u5b58\u50a8\u51fd\u6570count_by_id()\uff0c\u53c2\u6570\u4f20\u5165dept_id\uff0c\u8be5\u51fd\u6570\u67e5\u8be2dept_id\u90e8\u95e8\u7684\n#\u5458\u5de5\u4eba\u6570\uff0c\u5e76\u8fd4\u56de\uff0c\u6570\u636e\u7c7b\u578b\u4e3a\u6574\u578b\u3002\n\nDELIMITER \/\/\n\nCREATE FUNCTION count_by_id(dept_id INT)\nRETURNS INT\n\nBEGIN\n\tRETURN (SELECT COUNT(*) FROM employees WHERE department_id = dept_id);\n\t\nEND \/\/\n\nDELIMITER ;\n\n#\u8c03\u7528\nSET @dept_id := 50;\nSELECT count_by_id(@dept_id);<\/code><\/pre>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"15\" src=\"blob:https:\/\/eve2333.top\/1eb82c62-d253-4347-98e9-e9d8914dd84f\" width=\"15\"><\/p>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"271\" width=\"676\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/c98e3ee826fa449d84ed82a90c173e1c.png\" alt=\"\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">5. \u5b58\u50a8\u8fc7\u7a0b\u548c\u51fd\u6570\u7684\u67e5\u770b\u3001\u4fee\u6539\u3001\u5220\u9664<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">5.1 \u67e5\u770b<\/h3>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"442\" width=\"683\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/d3e925bf91f74ef286c09c4cbc6b92b9.png\" alt=\"\"><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#3. \u5b58\u50a8\u8fc7\u7a0b\u3001\u5b58\u50a8\u51fd\u6570\u7684\u67e5\u770b\n\n#\u65b9\u5f0f1. \u4f7f\u7528SHOW CREATE\u8bed\u53e5\u67e5\u770b\u5b58\u50a8\u8fc7\u7a0b\u548c\u51fd\u6570\u7684\u521b\u5efa\u4fe1\u606f\n\nSHOW CREATE PROCEDURE show_mgr_name;\n\nSHOW CREATE FUNCTION count_by_id;\n\n#\u65b9\u5f0f2. \u4f7f\u7528SHOW STATUS\u8bed\u53e5\u67e5\u770b\u5b58\u50a8\u8fc7\u7a0b\u548c\u51fd\u6570\u7684\u72b6\u6001\u4fe1\u606f\n\nSHOW PROCEDURE STATUS;\n\nSHOW PROCEDURE STATUS LIKE 'show_max_salary';\n\nSHOW FUNCTION STATUS LIKE 'email_by_id';\n\n#\u65b9\u5f0f3.\u4eceinformation_schema.Routines\u8868\u4e2d\u67e5\u770b\u5b58\u50a8\u8fc7\u7a0b\u548c\u51fd\u6570\u7684\u4fe1\u606f\n\nSELECT * FROM information_schema.Routines\nWHERE ROUTINE_NAME='email_by_id' AND ROUTINE_TYPE = 'FUNCTION';\n\nSELECT * FROM information_schema.Routines\nWHERE ROUTINE_NAME='show_min_salary' AND ROUTINE_TYPE = 'PROCEDURE';\n\n#4.\u5b58\u50a8\u8fc7\u7a0b\u3001\u51fd\u6570\u7684\u4fee\u6539\nALTER PROCEDURE show_max_salary\nSQL SECURITY INVOKER\nCOMMENT '\u67e5\u8be2\u6700\u9ad8\u5de5\u8d44';\n\n#5. \u5b58\u50a8\u8fc7\u7a0b\u3001\u51fd\u6570\u7684\u5220\u9664\n\nDROP FUNCTION IF EXISTS count_by_id;\n\nDROP PROCEDURE IF EXISTS show_min_salary;<\/code><\/pre>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"15\" src=\"blob:https:\/\/eve2333.top\/a279c3a8-abb7-4a40-bbae-7dd5679ff81c\" width=\"15\"><\/p>\n\n\n\n<p><img loading=\"lazy\" decoding=\"async\" height=\"1326\" width=\"723\" src=\"https:\/\/i-blog.csdnimg.cn\/direct\/7b2de16249b4493fb23a7ed25eaa2702.png\" alt=\"\"><\/p>\n\n\n\n<p>&nbsp;<a href=\"https:\/\/www.bilibili.com\/video\/BV1iq4y1u7vj?spm_id_from=333.788.player.switch&amp;vd_source=b31958e33027799323b8b7d77ae181d4&amp;p=81\" target=\"_blank\"  rel=\"nofollow\" >81-\u5b58\u50a8\u8fc7\u7a0b\u4e0e\u51fd\u6570\u7684\u67e5\u770b\u4fee\u6539\u548c\u5220\u9664_\u54d4\u54e9\u54d4\u54e9_bilibili<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">6. \u5173\u4e8e\u5b58\u50a8\u8fc7\u7a0b\u4f7f\u7528\u7684\u4e89\u8bae<\/h2>\n\n\n\n<p>\u5c3d\u7ba1\u5b58\u50a8\u8fc7\u7a0b\u6709\u8bf8\u591a\u4f18\u70b9\uff0c\u4f46\u662f\u5bf9\u4e8e\u5b58\u50a8\u8fc7\u7a0b\u7684\u4f7f\u7528\uff0c\u4e00\u76f4\u90fd\u5b58\u5728\u7740\u5f88\u591a\u4e89\u8bae\uff0c\u6bd4\u5982\u6709\u4e9b\u516c\u53f8\u5bf9\u4e8e\u5927\u578b\u9879\u76ee\u8981\u6c42\u4f7f\u7528\u5b58\u50a8\u8fc7\u7a0b\uff0c\u800c\u6709\u4e9b\u516c\u53f8\u5728\u624b\u518c\u4e2d\u660e\u786e\u7981\u6b62\u4f7f\u7528\u5b58\u50a8\u8fc7\u7a0b\uff0c\u4e3a\u4ec0\u4e48\u8fd9\u4e9b\u516c\u53f8\u5bf9\u5b58\u50a8\u8fc7\u7a0b\u7684\u4f7f\u7528\u9700\u6c42\u5dee\u522b\u8fd9\u4e48\u5927\u5462\uff1f<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6.1 \u4f18\u70b9<\/h3>\n\n\n\n<p>1. \u5b58\u50a8\u8fc7\u7a0b\u53ef\u4ee5\u4e00\u6b21\u7f16\u8bd1\u591a\u6b21\u4f7f\u7528\u3002\u5b58\u50a8\u8fc7\u7a0b\u53ea\u5728\u521b\u5efa\u65f6\u8fdb\u884c\u7f16\u8bd1\uff0c\u4e4b\u540e\u7684\u4f7f\u7528\u90fd\u4e0d\u9700\u8981\u91cd\u65b0\u7f16\u8bd1\uff0c\u8fd9\u5c31\u63d0\u5347\u4e86 SQL \u7684\u6267\u884c\u6548\u7387\u3002<br>2. \u53ef\u4ee5\u51cf\u5c11\u5f00\u53d1\u5de5\u4f5c\u91cf\u3002\u5c06\u4ee3\u7801 \u5c01\u88c5 \u6210\u6a21\u5757\uff0c\u5b9e\u9645\u4e0a\u662f\u7f16\u7a0b\u7684\u6838\u5fc3\u601d\u60f3\u4e4b\u4e00\uff0c\u8fd9\u6837\u53ef\u4ee5\u628a\u590d\u6742\u7684\u95ee\u9898\u62c6\u89e3\u6210\u4e0d\u540c\u7684\u6a21\u5757\uff0c\u7136\u540e\u6a21\u5757\u4e4b\u95f4\u53ef\u4ee5 \u91cd\u590d \u4f7f\u7528\uff0c\u5728\u51cf\u5c11\u5f00\u53d1\u5de5\u4f5c\u91cf\u7684\u540c\u65f6\uff0c\u8fd8\u80fd\u4fdd\u8bc1\u4ee3\u7801\u7684\u7ed3\u6784\u6e05\u6670\u3002<br>3. \u5b58\u50a8\u8fc7\u7a0b\u7684\u5b89\u5168\u6027\u5f3a\u3002\u6211\u4eec\u5728\u8bbe\u5b9a\u5b58\u50a8\u8fc7\u7a0b\u7684\u65f6\u5019\u53ef\u4ee5 \u8bbe\u7f6e\u5bf9\u7528\u6237\u7684\u4f7f\u7528\u6743\u9650\uff0c\u8fd9\u6837\u5c31\u548c\u89c6\u56fe\u4e00\u6837\u5177\u6709\u8f83\u5f3a\u7684\u5b89\u5168\u6027\u3002<br>4. \u53ef\u4ee5\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u91cf\u3002\u56e0\u4e3a\u4ee3\u7801\u5c01\u88c5\u5230\u5b58\u50a8\u8fc7\u7a0b\u4e2d\uff0c\u6bcf\u6b21\u4f7f\u7528\u53ea\u9700\u8981\u8c03\u7528\u5b58\u50a8\u8fc7\u7a0b\u5373\u53ef\uff0c\u8fd9\u6837\u5c31\u51cf\u5c11\u4e86\u7f51\u7edc\u4f20\u8f93\u91cf\u3002<br>5. \u826f\u597d\u7684\u5c01\u88c5\u6027\u3002\u5728\u8fdb\u884c\u76f8\u5bf9\u590d\u6742\u7684\u6570\u636e\u5e93\u64cd\u4f5c\u65f6\uff0c\u539f\u672c\u9700\u8981\u4f7f\u7528\u4e00\u6761\u4e00\u6761\u7684 SQL \u8bed\u53e5\uff0c\u53ef\u80fd\u8981\u8fde\u63a5\u591a\u6b21\u6570\u636e\u5e93\u624d\u80fd\u5b8c\u6210\u7684\u64cd\u4f5c\uff0c\u73b0\u5728\u53d8\u6210\u4e86\u4e00\u6b21\u5b58\u50a8\u8fc7\u7a0b\uff0c\u53ea\u9700\u8981 \u8fde\u63a5\u4e00\u6b21\u5373\u53ef\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6.2 \u7f3a\u70b9<\/h3>\n\n\n\n<p>\u57fa\u4e8e\u4e0a\u9762\u8fd9\u4e9b\u4f18\u70b9\uff0c\u4e0d\u5c11\u5927\u516c\u53f8\u90fd\u8981\u6c42\u5927\u578b\u9879\u76ee\u4f7f\u7528\u5b58\u50a8\u8fc7\u7a0b\uff0c\u6bd4\u5982\u5fae\u8f6f\u3001IBM \u7b49\u516c\u53f8\u3002\u4f46\u662f\u56fd\u5185\u7684\u963f\u91cc\u5e76\u4e0d\u63a8\u8350\u5f00\u53d1\u4eba\u5458\u4f7f\u7528\u5b58\u50a8\u8fc7\u7a0b\uff0c\u8fd9\u662f\u4e3a\u4ec0\u4e48\u5462\uff1f<\/p>\n\n\n\n<p>\u963f\u91cc\u5f00\u53d1\u89c4\u8303<br>\u3010\u5f3a\u5236\u3011\u7981\u6b62\u4f7f\u7528\u5b58\u50a8\u8fc7\u7a0b\uff0c\u5b58\u50a8\u8fc7\u7a0b\u96be\u4ee5\u8c03\u8bd5\u548c\u6269\u5c55\uff0c\u66f4\u6ca1\u6709\u79fb\u690d\u6027\u3002<\/p>\n\n\n\n<p>\u5b58\u50a8\u8fc7\u7a0b\u867d\u7136\u6709\u8bf8\u5982\u4e0a\u9762\u7684\u597d\u5904\uff0c\u4f46\u7f3a\u70b9\u4e5f\u662f\u5f88\u660e\u663e\u7684\u3002<\/p>\n\n\n\n<p>1. \u53ef\u79fb\u690d\u6027\u5dee\u3002\u5b58\u50a8\u8fc7\u7a0b\u4e0d\u80fd\u8de8\u6570\u636e\u5e93\u79fb\u690d\uff0c\u6bd4\u5982\u5728 MySQL\u3001Oracle \u548c SQL Server \u91cc\u7f16\u5199\u7684\u5b58\u50a8\u8fc7\u7a0b\uff0c\u5728\u6362\u6210\u5176\u4ed6\u6570\u636e\u5e93\u65f6\u90fd\u9700\u8981\u91cd\u65b0\u7f16\u5199\u3002<br>2. \u8c03\u8bd5\u56f0\u96be\u3002\u53ea\u6709\u5c11\u6570 DBMS \u652f\u6301\u5b58\u50a8\u8fc7\u7a0b\u7684\u8c03\u8bd5\u3002\u5bf9\u4e8e\u590d\u6742\u7684\u5b58\u50a8\u8fc7\u7a0b\u6765\u8bf4\uff0c\u5f00\u53d1\u548c\u7ef4\u62a4\u90fd\u4e0d\u5bb9\u6613\u3002\u867d\u7136\u4e5f\u6709\u4e00\u4e9b\u7b2c\u4e09\u65b9\u5de5\u5177\u53ef\u4ee5\u5bf9\u5b58\u50a8\u8fc7\u7a0b\u8fdb\u884c\u8c03\u8bd5\uff0c\u4f46\u8981\u6536\u8d39\u3002<br>3. \u5b58\u50a8\u8fc7\u7a0b\u7684\u7248\u672c\u7ba1\u7406\u5f88\u56f0\u96be\u3002\u6bd4\u5982\u6570\u636e\u8868\u7d22\u5f15\u53d1\u751f\u53d8\u5316\u4e86\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5b58\u50a8\u8fc7\u7a0b\u5931\u6548\u3002\u6211\u4eec\u5728\u5f00\u53d1\u8f6f\u4ef6\u7684\u65f6\u5019\u5f80\u5f80\u9700\u8981\u8fdb\u884c\u7248\u672c\u7ba1\u7406\uff0c\u4f46\u662f\u5b58\u50a8\u8fc7\u7a0b\u672c\u8eab\u6ca1\u6709\u7248\u672c\u63a7\u5236\uff0c\u7248\u672c\u8fed\u4ee3\u66f4\u65b0\u7684\u65f6\u5019\u5f88\u9ebb\u70e6\u3002<br>4. \u5b83\u4e0d\u9002\u5408\u9ad8\u5e76\u53d1\u7684\u573a\u666f\u3002\u9ad8\u5e76\u53d1\u7684\u573a\u666f\u9700\u8981\u51cf\u5c11\u6570\u636e\u5e93\u7684\u538b\u529b\uff0c\u6709\u65f6\u6570\u636e\u5e93\u4f1a\u91c7\u7528\u5206\u5e93\u5206\u8868\u7684\u65b9\u5f0f\uff0c\u800c\u4e14\u5bf9\u53ef\u6269\u5c55\u6027\u8981\u6c42\u5f88\u9ad8\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5b58\u50a8\u8fc7\u7a0b\u4f1a\u53d8\u5f97\u96be\u4ee5\u7ef4\u62a4\uff0c\u589e\u52a0\u6570\u636e\u5e93\u7684\u538b\u529b\uff0c\u663e\u7136\u5c31\u4e0d\u9002\u7528\u4e86\u3002<\/p>\n\n\n\n<p>\u5c0f\u7ed3\uff1a<br>\u5b58\u50a8\u8fc7\u7a0b\u65e2\u65b9\u4fbf\uff0c\u53c8\u6709\u5c40\u9650\u6027\u3002\u5c3d\u7ba1\u4e0d\u540c\u7684\u516c\u53f8\u5bf9\u5b58\u50a8\u8fc7\u7a0b\u7684\u6001\u5ea6\u4e0d\u4e00\uff0c\u4f46\u662f\u5bf9\u4e8e\u6211\u4eec\u5f00\u53d1\u4eba\u5458\u6765\u8bf4\uff0c\u4e0d\u8bba\u600e\u6837\uff0c\u638c\u63e1\u5b58\u50a8\u8fc7\u7a0b\u90fd\u662f\u5fc5\u5907\u7684\u6280\u80fd\u4e4b\u4e00\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u8bfe\u540e\u7ec3\u4e60<\/h1>\n\n\n\n<pre class=\"wp-block-code\"><code>#\u7b2c15\u7ae0_\u5b58\u50a8\u8fc7\u7a0b\u4e0e\u5b58\u50a8\u51fd\u6570\u7684\u8bfe\u540e\u7ec3\u4e60\n\n\n#0.\u51c6\u5907\u5de5\u4f5c\nCREATE DATABASE test15_pro_func;\n\nUSE test15_pro_func;\n\n#1. \u521b\u5efa\u5b58\u50a8\u8fc7\u7a0binsert_user(),\u5b9e\u73b0\u4f20\u5165\u7528\u6237\u540d\u548c\u5bc6\u7801\uff0c\u63d2\u5165\u5230admin\u8868\u4e2d\nCREATE TABLE admin(\nid INT PRIMARY KEY AUTO_INCREMENT,\nuser_name VARCHAR(15) NOT NULL,\npwd VARCHAR(25) NOT NULL\n\n);\n\nDELIMITER $\nCREATE PROCEDURE insert_user(IN user_name VARCHAR(15),IN pwd VARCHAR(25))\nBEGIN\n\tINSERT INTO admin(user_name,pwd)\n\tVALUES (user_name,pwd);\n\nEND $\n\nDELIMITER ;\n\n#\u8c03\u7528\n\nCALL insert_user('Tom','abc123');\n\nSELECT * FROM admin;\n\n\n#2. \u521b\u5efa\u5b58\u50a8\u8fc7\u7a0bget_phone(),\u5b9e\u73b0\u4f20\u5165\u5973\u795e\u7f16\u53f7\uff0c\u8fd4\u56de\u5973\u795e\u59d3\u540d\u548c\u5973\u795e\u7535\u8bdd\n\nCREATE TABLE beauty(\nid INT PRIMARY KEY AUTO_INCREMENT,\nNAME VARCHAR(15) NOT NULL,\nphone VARCHAR(15) UNIQUE,\nbirth DATE\n);\n\nINSERT INTO beauty(NAME,phone,birth)\nVALUES\n('\u6731\u8335','13201233453','1982-02-12'),\n('\u5b59\u71d5\u59ff','13501233653','1980-12-09'),\n('\u7530\u99a5\u7504','13651238755','1983-08-21'),\n('\u9093\u7d2b\u68cb','17843283452','1991-11-12'),\n('\u5218\u82e5\u82f1','18635575464','1989-05-18'),\n('\u6768\u8d85\u8d8a','13761238755','1994-05-11');\n\nSELECT * FROM beauty;\n\n\nDELIMITER \/\/\n\nCREATE PROCEDURE get_phone(IN id INT,OUT NAME VARCHAR(15),OUT phone VARCHAR(15))\nBEGIN\n\tSELECT b.name,b.phone INTO NAME,phone\n\tFROM beauty b\n\tWHERE b.id = id;\nEND \/\/\n\nDELIMITER ;\n\n#\u8c03\u7528\n\nCALL get_phone(3,@name,@phone);\nSELECT @name,@phone;\n\n#3. \u521b\u5efa\u5b58\u50a8\u8fc7\u7a0bdate_diff()\uff0c\u5b9e\u73b0\u4f20\u5165\u4e24\u4e2a\u5973\u795e\u751f\u65e5\uff0c\u8fd4\u56de\u65e5\u671f\u95f4\u9694\u5927\u5c0f\n\nDELIMITER \/\/\n\nCREATE PROCEDURE date_diff(IN birth1 DATE,IN birth2 DATE,OUT sum_date INT)\nBEGIN\n\tSELECT DATEDIFF(birth1,birth2) INTO sum_date;\n\nEND \/\/\n\nDELIMITER ;\n\n#\u8c03\u7528\n\nSET @birth1 = '1992-10-30';\nSET @birth2 = '1992-09-08';\n\nCALL date_diff(@birth1,@birth2,@sum_date);\n\nSELECT @sum_date;\n\n\n#4. \u521b\u5efa\u5b58\u50a8\u8fc7\u7a0bformat_date(),\u5b9e\u73b0\u4f20\u5165\u4e00\u4e2a\u65e5\u671f\uff0c\u683c\u5f0f\u5316\u6210xx\u5e74xx\u6708xx\u65e5\u5e76\u8fd4\u56de\n\nDELIMITER \/\/\n\nCREATE PROCEDURE format_date(IN my_date DATE,OUT str_date VARCHAR(25))\nBEGIN\n\tSELECT DATE_FORMAT(my_date,'%y\u5e74%m\u6708%d\u65e5') INTO str_date;\n\nEND \/\/\n\nDELIMITER ;\n\n#\u8c03\u7528\nCALL format_date(CURDATE(),@str);\nSELECT @str;\n\n#5. \u521b\u5efa\u5b58\u50a8\u8fc7\u7a0bbeauty_limit()\uff0c\u6839\u636e\u4f20\u5165\u7684\u8d77\u59cb\u7d22\u5f15\u548c\u6761\u76ee\u6570\uff0c\u67e5\u8be2\u5973\u795e\u8868\u7684\u8bb0\u5f55\n\nDELIMITER \/\/\n\nCREATE PROCEDURE beauty_limit(IN start_index INT,IN size INT)\nBEGIN\n\tSELECT * FROM beauty LIMIT start_index,size;\nEND \/\/\n\nDELIMITER ;\n\n#\u8c03\u7528\nCALL beauty_limit(1,3);\n\n\n#\u521b\u5efa\u5e26inout\u6a21\u5f0f\u53c2\u6570\u7684\u5b58\u50a8\u8fc7\u7a0b\n#6. \u4f20\u5165a\u548cb\u4e24\u4e2a\u503c\uff0c\u6700\u7ec8a\u548cb\u90fd\u7ffb\u500d\u5e76\u8fd4\u56de\n\nDELIMITER \/\/\n\nCREATE PROCEDURE add_double(INOUT a INT,INOUT b INT)\nBEGIN\n\tSET a = a * 2;\n\tSET b = b * 2;\n\nEND \/\/\n\nDELIMITER ;\n\n#\u8c03\u7528\nSET @a = 3,@b = 5;\nCALL add_double(@a,@b);\n\nSELECT @a,@b;\n\n\n#7. \u5220\u9664\u9898\u76ee5\u7684\u5b58\u50a8\u8fc7\u7a0b\n\nDROP PROCEDURE IF EXISTS beauty_limit;\n\n\n#8. \u67e5\u770b\u9898\u76ee6\u4e2d\u5b58\u50a8\u8fc7\u7a0b\u7684\u4fe1\u606f\n\nSHOW CREATE PROCEDURE add_double;\n\nSHOW PROCEDURE STATUS LIKE 'add_%';\n\n#\u5b58\u50a8\u51fd\u6570\u7684\u7ec3\u4e60\n\n#0. \u51c6\u5907\u5de5\u4f5c\nUSE test15_pro_func;\n\nCREATE TABLE employees\nAS\nSELECT * FROM atguigudb.`employees`;\n\nCREATE TABLE departments\nAS\nSELECT * FROM atguigudb.`departments`;\n\n\nSET GLOBAL log_bin_trust_function_creators = 1;\n\n#\u65e0\u53c2\u6709\u8fd4\u56de\n#1. \u521b\u5efa\u51fd\u6570get_count(),\u8fd4\u56de\u516c\u53f8\u7684\u5458\u5de5\u4e2a\u6570\n\nDELIMITER $\n\nCREATE FUNCTION get_count()\nRETURNS INT\n\nBEGIN\n\tRETURN (SELECT COUNT(*) FROM employees);\nEND $\n\nDELIMITER ;\n\n#\u8c03\u7528\nSELECT get_count();\n\n\n#\u6709\u53c2\u6709\u8fd4\u56de\n#2. \u521b\u5efa\u51fd\u6570ename_salary(),\u6839\u636e\u5458\u5de5\u59d3\u540d\uff0c\u8fd4\u56de\u5b83\u7684\u5de5\u8d44\n\nDELIMITER $\n\nCREATE FUNCTION ename_salary(emp_name VARCHAR(15))\nRETURNS DOUBLE\n\nBEGIN\n\tRETURN (SELECT salary FROM employees WHERE last_name = emp_name);\nEND $\n\nDELIMITER ;\n\n#\u8c03\u7528\nSELECT ename_salary('Abel');\n\n\n#3. \u521b\u5efa\u51fd\u6570dept_sal() ,\u6839\u636e\u90e8\u95e8\u540d\uff0c\u8fd4\u56de\u8be5\u90e8\u95e8\u7684\u5e73\u5747\u5de5\u8d44\n\nDELIMITER \/\/\n\nCREATE FUNCTION dept_sal(dept_name VARCHAR(15))\nRETURNS DOUBLE\n\nBEGIN\n\tRETURN (SELECT AVG(salary)\n\t\tFROM employees e JOIN departments d\n\t\tON e.department_id = d.department_id\n\t\tWHERE d.department_name = dept_name);\n\nEND \/\/\n\nDELIMITER ;\n\n#\u8c03\u7528\n\nSELECT * FROM departments;\n\nSELECT dept_sal('Marketing');\n\n\n#4. \u521b\u5efa\u51fd\u6570add_float()\uff0c\u5b9e\u73b0\u4f20\u5165\u4e24\u4e2afloat\uff0c\u8fd4\u56de\u4e8c\u8005\u4e4b\u548c\n\nDELIMITER \/\/\n\nCREATE FUNCTION add_float(value1 FLOAT,value2 FLOAT)\nRETURNS FLOAT\n\nBEGIN\n\tRETURN (SELECT value1 + value2 );\n\nEND \/\/\n\nDELIMITER ;\n\n# \u8c03\u7528\nSET @v1 := 12.2;\nSET @v2 = 2.3;\nSELECT add_float(@v1,@v2);<img loading=\"lazy\" decoding=\"async\" height=\"15\" width=\"15\" src=\"blob:https:\/\/eve2333.top\/3f1b1062-b463-46b5-8f3f-6b8b076031a4\"><\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp;\u7b2c15\u7ae0_\u5b58\u50a8\u8fc7\u7a0b\u4e0e\u51fd\u6570 1. \u5b58\u50a8\u8fc7\u7a0b\u6982\u8ff0 \u5b58\u50a8\u8fc7\u7a0b\u7684\u82f1\u6587\u662f Stored Procedure \u3002\u5b83\u7684\u601d\u60f3\u5f88\u7b80\u5355\uff0c\u5c31 &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[2],"tags":[16],"class_list":["post-865","post","type-post","status-publish","format-standard","hentry","category-2","tag-sql"],"_links":{"self":[{"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/posts\/865","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/eve2333.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=865"}],"version-history":[{"count":1,"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/posts\/865\/revisions"}],"predecessor-version":[{"id":869,"href":"https:\/\/eve2333.top\/index.php?rest_route=\/wp\/v2\/posts\/865\/revisions\/869"}],"wp:attachment":[{"href":"https:\/\/eve2333.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=865"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/eve2333.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=865"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/eve2333.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}