{"id":144039,"date":"2024-11-01T03:25:42","date_gmt":"2024-10-31T19:25:42","guid":{"rendered":"https:\/\/server.hk\/cnblog\/144039\/"},"modified":"2024-11-01T03:25:43","modified_gmt":"2024-10-31T19:25:43","slug":"sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%b7%bb%e5%8a%a0%e5%8f%96%e5%80%bc%e7%af%84%e5%9c%8d-%e6%95%b8%e6%93%9a%e5%ba%ab-sql-%e6%b7%bb%e5%8a%a0%e5%8f%96%e5%80%bc%e7%af%84%e5%9c%8d%e5%85%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/144039\/","title":{"rendered":"SQL \u6578\u64da\u5eab\u6dfb\u52a0\u53d6\u503c\u7bc4\u570d (\u6578\u64da\u5eab sql \u6dfb\u52a0\u53d6\u503c\u7bc4\u570d\u5167)"},"content":{"rendered":"<h1 id=\"sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%b7%bb%e5%8a%a0%e5%8f%96%e5%80%bc%e7%af%84%e5%9c%8d-%e6%95%b8%e6%93%9a%e5%ba%ab-sql-%e6%b7%bb%e5%8a%a0%e5%8f%96%e5%80%bc%e7%af%84%e5%9c%8d%e5%85%a7-sHXwKYApqb\">SQL \u6578\u64da\u5eab\u6dfb\u52a0\u53d6\u503c\u7bc4\u570d (\u6578\u64da\u5eab SQL \u6dfb\u52a0\u53d6\u503c\u7bc4\u570d\u5167)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u6709\u6548\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002SQL \u6578\u64da\u5eab\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u9650\u5236\u6578\u64da\u7684\u53d6\u503c\u7bc4\u570d\uff0c\u4ee5\u9632\u6b62\u4e0d\u6b63\u78ba\u6216\u4e0d\u5408\u908f\u8f2f\u7684\u6578\u64da\u9032\u5165\u6578\u64da\u5eab\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728 SQL \u6578\u64da\u5eab\u4e2d\u6dfb\u52a0\u53d6\u503c\u7bc4\u570d\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bd%95%e9%9c%80%e8%a6%81%e8%a8%ad%e7%bd%ae%e5%8f%96%e5%80%bc%e7%af%84%e5%9c%8d-sHXwKYApqb\">\u70ba\u4f55\u9700\u8981\u8a2d\u7f6e\u53d6\u503c\u7bc4\u570d<\/h2>\n<p>\u8a2d\u7f6e\u53d6\u503c\u7bc4\u570d\u7684\u4e3b\u8981\u76ee\u7684\u662f\u78ba\u4fdd\u6578\u64da\u7684\u6709\u6548\u6027\u548c\u4e00\u81f4\u6027\u3002\u7576\u6578\u64da\u4e0d\u7b26\u5408\u9810\u671f\u7684\u7bc4\u570d\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u61c9\u7528\u7a0b\u5e8f\u932f\u8aa4\u6216\u6578\u64da\u5206\u6790\u7d50\u679c\u4e0d\u6e96\u78ba\u3002\u901a\u904e\u9650\u5236\u6578\u64da\u7684\u53d6\u503c\u7bc4\u570d\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u9019\u4e9b\u554f\u984c\u7684\u767c\u751f\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-check-%e7%b4%84%e6%9d%9f-sHXwKYApqb\">\u4f7f\u7528 CHECK \u7d04\u675f<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u4e4b\u4e00\u662f\u4f7f\u7528 <code>CHECK<\/code> \u7d04\u675f\u3002\u9019\u7a2e\u7d04\u675f\u5141\u8a31\u7528\u6236\u5b9a\u7fa9\u4e00\u500b\u689d\u4ef6\uff0c\u53ea\u6709\u7576\u6578\u64da\u6eff\u8db3\u8a72\u689d\u4ef6\u6642\uff0c\u624d\u80fd\u88ab\u63d2\u5165\u6216\u66f4\u65b0\u5230\u6578\u64da\u8868\u4e2d\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e4%bd%bf%e7%94%a8-check-%e7%b4%84%e6%9d%9f-sHXwKYApqb\">\u793a\u4f8b\uff1a\u4f7f\u7528 CHECK \u7d04\u675f<\/h3>\n<pre><code>CREATE TABLE \u54e1\u5de5 (\n    \u54e1\u5de5ID INT PRIMARY KEY,\n    \u5e74\u9f61 INT CHECK (\u5e74\u9f61 &gt;= 18 AND \u5e74\u9f61  0)\n);\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba <code>\u54e1\u5de5<\/code> \u7684\u8868\uff0c\u4e26\u70ba <code>\u5e74\u9f61<\/code> \u548c <code>\u85aa\u6c34<\/code> \u5217\u8a2d\u7f6e\u4e86\u53d6\u503c\u7bc4\u570d\u3002\u9019\u6a23\uff0c\u53ea\u6709\u5e74\u9f61\u5728 18 \u5230 65 \u6b72\u4e4b\u9593\u4e14\u85aa\u6c34\u5927\u65bc 0 \u7684\u6578\u64da\u624d\u80fd\u88ab\u63d2\u5165\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-enum-%e9%a1%9e%e5%9e%8b-sHXwKYApqb\">\u4f7f\u7528 ENUM \u985e\u578b<\/h2>\n<p>\u53e6\u4e00\u7a2e\u8a2d\u7f6e\u53d6\u503c\u7bc4\u570d\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 <code>ENUM<\/code> \u985e\u578b\u3002\u9019\u7a2e\u6578\u64da\u985e\u578b\u5141\u8a31\u7528\u6236\u5b9a\u7fa9\u4e00\u7d44\u9810\u5b9a\u7fa9\u7684\u503c\uff0c\u4e26\u4e14\u53ea\u80fd\u5f9e\u9019\u4e9b\u503c\u4e2d\u9078\u64c7\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e4%bd%bf%e7%94%a8-enum-%e9%a1%9e%e5%9e%8b-sHXwKYApqb\">\u793a\u4f8b\uff1a\u4f7f\u7528 ENUM \u985e\u578b<\/h3>\n<pre><code>CREATE TABLE \u8a02\u55ae (\n    \u8a02\u55aeID INT PRIMARY KEY,\n    \u72c0\u614b ENUM('\u5f85\u8655\u7406', '\u5df2\u767c\u8ca8', '\u5df2\u5b8c\u6210', '\u5df2\u53d6\u6d88') NOT NULL\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c<code>\u72c0\u614b<\/code> \u5217\u53ea\u80fd\u53d6\u56db\u500b\u9810\u5b9a\u7fa9\u7684\u503c\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e8%a7%b8%e7%99%bc%e5%99%a8%e9%80%b2%e8%a1%8c%e6%9b%b4%e8%a4%87%e9%9b%9c%e7%9a%84%e6%aa%a2%e6%9f%a5-sHXwKYApqb\">\u4f7f\u7528\u89f8\u767c\u5668\u9032\u884c\u66f4\u8907\u96dc\u7684\u6aa2\u67e5<\/h2>\n<p>\u5c0d\u65bc\u66f4\u8907\u96dc\u7684\u53d6\u503c\u7bc4\u570d\u6aa2\u67e5\uff0c\u53ef\u4ee5\u4f7f\u7528\u89f8\u767c\u5668\u3002\u89f8\u767c\u5668\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u5b58\u5132\u904e\u7a0b\uff0c\u6703\u5728\u7279\u5b9a\u4e8b\u4ef6\uff08\u5982\u63d2\u5165\u6216\u66f4\u65b0\uff09\u767c\u751f\u6642\u81ea\u52d5\u57f7\u884c\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e4%bd%bf%e7%94%a8%e8%a7%b8%e7%99%bc%e5%99%a8-sHXwKYApqb\">\u793a\u4f8b\uff1a\u4f7f\u7528\u89f8\u767c\u5668<\/h3>\n<pre><code>CREATE TRIGGER \u6aa2\u67e5\u5e74\u9f61\nBEFORE INSERT ON \u54e1\u5de5\nFOR EACH ROW\nBEGIN\n    IF NEW.\u5e74\u9f61  65 THEN\n        SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = '\u5e74\u9f61\u5fc5\u9808\u5728 18 \u5230 65 \u6b72\u4e4b\u9593';\n    END IF;\nEND;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u89f8\u767c\u5668\uff0c\u7576\u8a66\u5716\u63d2\u5165\u4e0d\u7b26\u5408\u5e74\u9f61\u7bc4\u570d\u7684\u6578\u64da\u6642\uff0c\u5c07\u6703\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-sHXwKYApqb\">\u7e3d\u7d50<\/h2>\n<p>\u5728 SQL \u6578\u64da\u5eab\u4e2d\u8a2d\u7f6e\u53d6\u503c\u7bc4\u570d\u662f\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u7684\u91cd\u8981\u6b65\u9a5f\u3002\u901a\u904e\u4f7f\u7528 <code>CHECK<\/code> \u7d04\u675f\u3001<code>ENUM<\/code> \u985e\u578b\u548c\u89f8\u767c\u5668\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u63a7\u5236\u6578\u64da\u7684\u6709\u6548\u6027\uff0c\u5f9e\u800c\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u548c\u5b89\u5168\u6027\uff0c\u9032\u4e00\u6b65\u652f\u6301\u6578\u64da\u5eab\u7684\u904b\u884c\u548c\u7ba1\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728 SQL \u6578\u64da\u5eab\u4e2d\u6dfb\u52a0\u53d6\u503c\u7bc4\u570d\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u6709\u6548\u6027\u8207\u5b8c\u6574\u6027\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-144039","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144039","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=144039"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144039\/revisions"}],"predecessor-version":[{"id":144040,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/144039\/revisions\/144040"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=144039"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=144039"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=144039"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}