{"id":200029,"date":"2025-05-06T11:23:08","date_gmt":"2025-05-06T03:23:08","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200029\/"},"modified":"2025-05-06T11:23:08","modified_gmt":"2025-05-06T03:23:08","slug":"%e8%a7%a3%e5%86%b3mysql%e4%b8%ad%e5%b8%83%e5%b0%94%e7%b1%bb%e5%9e%8b%e7%9a%84%e5%b8%b8%e8%a7%81%e7%96%91%e6%83%91","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200029\/","title":{"rendered":"\u89e3\u51b3MySQL\u4e2d\u5e03\u5c14\u7c7b\u578b\u7684\u5e38\u89c1\u7591\u60d1"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u89e3\u51b3MySQL\u4e2d\u5e03\u5c14\u7c7b\u578b\u7684\u5e38\u89c1\u7591\u60d1<\/h1>\n<p>\u54c8\u55bd\uff01\u4eca\u5929\u5fc3\u8840\u6765\u6f6e\u7ed9\u5927\u5bb6\u5e26\u6765\u4e86\uff0c\u60f3\u5fc5\u5927\u5bb6\u5e94\u8be5\u5bf9\u90fd\u4e0d\u964c\u751f\u5427\uff0c\u90a3\u4e48\u9605\u8bfb\u672c\u6587\u5c31\u90fd\u4e0d\u4f1a\u5f88\u56f0\u96be\uff0c\u4ee5\u4e0b\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230\uff0c\u82e5\u662f\u4f60\u6b63\u5728\u5b66\u4e60\uff0c\u5343\u4e07\u522b\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u4f60\uff01<\/p>\n<p>MySQL\u4e2d\u5e03\u5c14\u7c7b\u578b\u7684\u5e38\u89c1\u95ee\u9898\u89e3\u51b3<\/p>\n<p>\u5728MySQL\u6570\u636e\u5e93\u4e2d\uff0c\u5e03\u5c14\u7c7b\u578b\u901a\u5e38\u88ab\u8868\u793a\u4e3aTINYINT(1)\uff0c\u5176\u4e2d0\u4ee3\u8868false\uff0c1\u4ee3\u8868true\u3002\u867d\u7136\u5e03\u5c14\u7c7b\u578b\u770b\u4f3c\u7b80\u5355\uff0c\u4f46\u5728\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u4e5f\u53ef\u80fd\u4f1a\u9047\u5230\u4e00\u4e9b\u5e38\u89c1\u7684\u95ee\u9898\u3002\u672c\u6587\u5c06\u9488\u5bf9MySQL\u4e2d\u5e03\u5c14\u7c7b\u578b\u7684\u5e38\u89c1\u95ee\u9898\u8fdb\u884c\u89e3\u51b3\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\uff0c\u5e0c\u671b\u80fd\u591f\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u5e94\u7528\u5e03\u5c14\u7c7b\u578b\u6570\u636e\u3002<\/p>\n<p><strong>\u95ee\u9898\u4e00\uff1a\u63d2\u5165\u5e03\u5c14\u503c<\/strong><\/p>\n<p>\u5728MySQL\u4e2d\u63d2\u5165\u5e03\u5c14\u503c\u65f6\uff0c\u6709\u65f6\u5019\u6211\u4eec\u53ef\u80fd\u4f1a\u9047\u5230\u6570\u636e\u63d2\u5165\u4e0d\u6210\u529f\u7684\u95ee\u9898\u3002\u8fd9\u901a\u5e38\u662f\u56e0\u4e3aMySQL\u5bf9\u5e03\u5c14\u7c7b\u578b\u7684\u63d2\u5165\u65b9\u5f0f\u6709\u4e00\u5b9a\u8981\u6c42\u3002\u5728\u63d2\u5165\u5e03\u5c14\u503c\u65f6\uff0c\u6211\u4eec\u9700\u8981\u786e\u4fdd\u63d2\u5165\u7684\u503c\u662f0\u62161\uff0c\u4e0d\u80fd\u76f4\u63a5\u63d2\u5165true\u6216false\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u63d2\u5165\u5e03\u5c14\u503c\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre>-- \u521b\u5efa\u4e00\u4e2a\u5305\u542b\u5e03\u5c14\u7c7b\u578b\u5b57\u6bb5\u7684\u8868\nCREATE TABLE user (\n    id INT PRIMARY KEY,\n    name VARCHAR(50),\n    is_active TINYINT(1)\n);\n\n-- \u63d2\u5165\u6570\u636e\nINSERT INTO user (id, name, is_active) VALUES (1, 'Alice', 1);\nINSERT INTO user (id, name, is_active) VALUES (2, 'Bob', 0);<\/pre>\n<p><strong>\u95ee\u9898\u4e8c\uff1a\u5e03\u5c14\u503c\u7684\u67e5\u8be2<\/strong><\/p>\n<p>\u5f53\u6211\u4eec\u9700\u8981\u67e5\u8be2\u5e03\u5c14\u7c7b\u578b\u5b57\u6bb5\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528WHERE\u6761\u4ef6\u6765\u7b5b\u9009\u6ee1\u8db3\u6761\u4ef6\u7684\u8bb0\u5f55\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5728\u67e5\u8be2\u5e03\u5c14\u503c\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u4f7f\u75280\u62161\u6765\u4f5c\u4e3a\u6761\u4ef6\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528true\u6216false\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u67e5\u8be2\u5e03\u5c14\u503c\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre>-- \u67e5\u8be2is_active\u4e3a1\u7684\u7528\u6237\nSELECT * FROM user WHERE is_active = 1;\n\n-- \u540c\u6837\u7684\u6548\u679c\uff0c\u67e5\u8be2is_active\u4e3a1\u7684\u7528\u6237\nSELECT * FROM user WHERE is_active = true;<\/pre>\n<p><strong>\u95ee\u9898\u4e09\uff1a\u66f4\u65b0\u5e03\u5c14\u503c<\/strong><\/p>\n<p>\u66f4\u65b0\u5e03\u5c14\u7c7b\u578b\u5b57\u6bb5\u7684\u503c\u4e5f\u662f\u5e38\u89c1\u7684\u64cd\u4f5c\u3002\u5728\u66f4\u65b0\u5e03\u5c14\u503c\u65f6\uff0c\u540c\u6837\u9700\u8981\u786e\u4fdd\u66f4\u65b0\u7684\u503c\u662f\u5408\u6cd5\u7684\u5e03\u5c14\u503c\uff0c\u53730\u62161\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u66f4\u65b0\u5e03\u5c14\u503c\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre>-- \u5c06id\u4e3a2\u7684\u7528\u6237is_active\u5b57\u6bb5\u66f4\u65b0\u4e3a1\nUPDATE user SET is_active = 1 WHERE id = 2;<\/pre>\n<p><strong>\u95ee\u9898\u56db\uff1a\u5e03\u5c14\u503c\u7684\u8ba1\u7b97<\/strong><\/p>\n<p>\u5728MySQL\u4e2d\uff0c\u5e03\u5c14\u503c\u4e5f\u53ef\u4ee5\u53c2\u4e0e\u4e00\u4e9b\u7b80\u5355\u7684\u8ba1\u7b97\u64cd\u4f5c\uff0c\u4f8b\u5982\u6c42\u548c\u3001\u5e73\u5747\u503c\u7b49\u3002\u5728\u8fdb\u884c\u8ba1\u7b97\u65f6\uff0c\u5e03\u5c14\u503c\u4f1a\u88ab\u5f53\u4f5c0\u62161\u6765\u53c2\u4e0e\u8fd0\u7b97\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5e03\u5c14\u503c\u53c2\u4e0e\u8ba1\u7b97\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre>-- \u8ba1\u7b97is_active\u5b57\u6bb5\u4e3a1\u7684\u7528\u6237\u6570\u91cf\nSELECT COUNT(*) FROM user WHERE is_active = 1;<\/pre>\n<p>\u901a\u8fc7\u4ee5\u4e0a\u4ee3\u7801\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u597d\u5730\u7406\u89e3\u548c\u5e94\u7528MySQL\u4e2d\u5e03\u5c14\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5e76\u89e3\u51b3\u5728\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u9047\u5230\u7684\u5e38\u89c1\u95ee\u9898\u3002\u5e0c\u671b\u672c\u6587\u80fd\u591f\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u5229\u7528MySQL\u4e2d\u7684\u5e03\u5c14\u7c7b\u578b\u6570\u636e\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\u4e3b\u673a\u5b9d\u8d1d\uff01\u66f4\u591a\u5173\u4e8e\u6570\u636e\u5e93\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u3002<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u51b3MySQL\u4e2d\u5e03\u5c14\u7c7b\u578b\u7684\u5e38\u89c1\u7591&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200029","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200029","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200029"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200029\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200029"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200029"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200029"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}