{"id":185942,"date":"2024-11-11T01:47:26","date_gmt":"2024-11-10T17:47:26","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185942\/"},"modified":"2024-11-11T01:47:27","modified_gmt":"2024-11-10T17:47:27","slug":"%e6%95%b8%e6%93%9a%e5%ba%abbool%e5%8e%9f%e7%90%86%e8%88%87%e6%87%89%e7%94%a8%e7%b0%a1%e4%bb%8b%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%abbool%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185942\/","title":{"rendered":"\u6578\u64da\u5eabbool\u539f\u7406\u8207\u61c9\u7528\u7c21\u4ecb\uff08\u6578\u64da\u5eabbool\uff09"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%abbool%e5%8e%9f%e7%90%86%e8%88%87%e6%87%89%e7%94%a8%e7%b0%a1%e4%bb%8b%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%abbool%ef%bc%89-DRWvZHipEb\">\u6578\u64da\u5eabbool\u539f\u7406\u8207\u61c9\u7528\u7c21\u4ecb\uff08\u6578\u64da\u5eabbool\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u8a2d\u8a08\u8207\u7ba1\u7406\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u6578\u64da\u5eab\u4e2d\u7684\u5e03\u723e\uff08bool\uff09\u985e\u578b\u662f\u4e00\u500b\u57fa\u672c\u800c\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5c0d\u65bc\u6578\u64da\u7684\u5b58\u5132\u548c\u67e5\u8a62\u6709\u8457\u6df1\u9060\u7684\u5f71\u97ff\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u6578\u64da\u5eab\u4e2d\u7684\u5e03\u723e\u539f\u7406\u53ca\u5176\u61c9\u7528\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u4e00\u6982\u5ff5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%b8%83%e7%88%be%e9%a1%9e%e5%9e%8b%ef%bc%9f-DRWvZHipEb\">\u4ec0\u9ebc\u662f\u5e03\u723e\u985e\u578b\uff1f<\/h2>\n<p>\u5e03\u723e\u985e\u578b\u662f\u4e00\u7a2e\u6578\u64da\u985e\u578b\uff0c\u901a\u5e38\u7528\u65bc\u8868\u793a\u771f\uff08true\uff09\u6216\u5047\uff08false\uff09\u5169\u7a2e\u72c0\u614b\u3002\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u5e03\u723e\u985e\u578b\u901a\u5e38\u7528\u4f86\u5b58\u5132\u4e8c\u5143\u9078\u64c7\u7684\u6578\u64da\uff0c\u4f8b\u5982\u7528\u6236\u662f\u5426\u8a02\u95b1\u4e86\u67d0\u9805\u670d\u52d9\u3001\u7522\u54c1\u662f\u5426\u6709\u5eab\u5b58\u7b49\u3002\u9019\u7a2e\u6578\u64da\u985e\u578b\u7684\u4f7f\u7528\u53ef\u4ee5\u6709\u6548\u5730\u7c21\u5316\u6578\u64da\u7684\u5b58\u5132\u548c\u67e5\u8a62\u3002<\/p>\n<h2 id=\"%e5%b8%83%e7%88%be%e9%a1%9e%e5%9e%8b%e7%9a%84%e5%ad%98%e5%84%b2%e6%96%b9%e5%bc%8f-DRWvZHipEb\">\u5e03\u723e\u985e\u578b\u7684\u5b58\u5132\u65b9\u5f0f<\/h2>\n<p>\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\uff0c\u5e03\u723e\u985e\u578b\u7684\u5b58\u5132\u65b9\u5f0f\u53ef\u80fd\u6703\u6709\u6240\u4e0d\u540c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u5c0d\u5e03\u723e\u985e\u578b\u7684\u652f\u6301\uff1a<\/p>\n<ul>\n<li><strong>MySQL\uff1a<\/strong>\u5728MySQL\u4e2d\uff0c\u5e03\u723e\u985e\u578b\u901a\u5e38\u4f7f\u7528TINYINT(1)\u4f86\u8868\u793a\uff0c0\u8868\u793a\u5047\uff0c1\u8868\u793a\u771f\u3002<\/li>\n<li><strong>PostgreSQL\uff1a<\/strong>PostgreSQL\u63d0\u4f9b\u4e86\u539f\u751f\u7684\u5e03\u723e\u985e\u578b\uff0c\u4f7f\u7528BOOLEAN\u4f86\u8868\u793a\uff0c\u503c\u53ef\u4ee5\u662fTRUE\u6216FALSE\u3002<\/li>\n<li><strong>SQLite\uff1a<\/strong>SQLite\u4e26\u6c92\u6709\u5c08\u9580\u7684\u5e03\u723e\u985e\u578b\uff0c\u901a\u5e38\u4f7f\u7528\u6574\u65780\u548c1\u4f86\u8868\u793a\u5047\u548c\u771f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%b8%83%e7%88%be%e9%a1%9e%e5%9e%8b%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-DRWvZHipEb\">\u5e03\u723e\u985e\u578b\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>\u5e03\u723e\u985e\u578b\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528\u5834\u666f\u975e\u5e38\u5ee3\u6cdb\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u4f8b\u5b50\uff1a<\/p>\n<h3 id=\"1-%e7%94%a8%e6%88%b6%e7%ae%a1%e7%90%86-DRWvZHipEb\">1. \u7528\u6236\u7ba1\u7406<\/h3>\n<p>\u5728\u7528\u6236\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5e03\u723e\u985e\u578b\u4f86\u8868\u793a\u7528\u6236\u7684\u72c0\u614b\uff0c\u4f8b\u5982\u662f\u5426\u555f\u7528\u5e33\u6236\u3001\u662f\u5426\u70ba\u7ba1\u7406\u54e1\u7b49\u3002<\/p>\n<pre><code>CREATE TABLE users (\n    id INT PRIMARY KEY,\n    username VARCHAR(50),\n    is_active TINYINT(1),\n    is_admin TINYINT(1)\n);<\/code><\/pre>\n<h3 id=\"2-%e7%94%a2%e5%93%81%e5%ba%ab%e5%ad%98-DRWvZHipEb\">2. \u7522\u54c1\u5eab\u5b58<\/h3>\n<p>\u5728\u96fb\u5b50\u5546\u52d9\u5e73\u53f0\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5e03\u723e\u985e\u578b\u4f86\u8868\u793a\u7522\u54c1\u662f\u5426\u6709\u5eab\u5b58\uff0c\u9019\u6a23\u5728\u67e5\u8a62\u6642\u53ef\u4ee5\u5feb\u901f\u904e\u6ffe\u51fa\u6709\u5eab\u5b58\u7684\u7522\u54c1\u3002<\/p>\n<pre><code>CREATE TABLE products (\n    id INT PRIMARY KEY,\n    name VARCHAR(100),\n    in_stock TINYINT(1)\n);<\/code><\/pre>\n<h3 id=\"3-%e8%a8%82%e9%96%b1%e6%9c%8d%e5%8b%99-DRWvZHipEb\">3. \u8a02\u95b1\u670d\u52d9<\/h3>\n<p>\u5728\u8a02\u95b1\u670d\u52d9\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5e03\u723e\u985e\u578b\u4f86\u8868\u793a\u7528\u6236\u662f\u5426\u8a02\u95b1\u4e86\u67d0\u9805\u670d\u52d9\uff0c\u9019\u6a23\u53ef\u4ee5\u65b9\u4fbf\u5730\u9032\u884c\u7d71\u8a08\u548c\u5206\u6790\u3002<\/p>\n<pre><code>CREATE TABLE subscriptions (\n    user_id INT,\n    service_id INT,\n    is_subscribed TINYINT(1)\n);<\/code><\/pre>\n<h2 id=\"%e5%b8%83%e7%88%be%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%af%a6%e7%8f%be-DRWvZHipEb\">\u5e03\u723e\u67e5\u8a62\u7684\u5be6\u73fe<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u5e03\u723e\u67e5\u8a62\u901a\u5e38\u4f7f\u7528WHERE\u5b50\u53e5\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u793a\u4f8b\uff1a<\/p>\n<pre><code>-- \u67e5\u8a62\u6240\u6709\u555f\u7528\u7684\u7528\u6236\nSELECT * FROM users WHERE is_active = 1;\n\n-- \u67e5\u8a62\u6240\u6709\u6709\u5eab\u5b58\u7684\u7522\u54c1\nSELECT * FROM products WHERE in_stock = 1;\n\n-- \u67e5\u8a62\u6240\u6709\u8a02\u95b1\u4e86\u670d\u52d9\u7684\u7528\u6236\nSELECT * FROM subscriptions WHERE is_subscribed = 1;<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-DRWvZHipEb\">\u7d50\u8ad6<\/h2>\n<p>\u5e03\u723e\u985e\u578b\u5728\u6578\u64da\u5eab\u4e2d\u626e\u6f14\u8457\u91cd\u8981\u7684\u89d2\u8272\uff0c\u7121\u8ad6\u662f\u5728\u6578\u64da\u7684\u5b58\u5132\u9084\u662f\u67e5\u8a62\u4e2d\uff0c\u90fd\u80fd\u5920\u63d0\u4f9b\u7c21\u6f54\u800c\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u901a\u904e\u5408\u7406\u5730\u4f7f\u7528\u5e03\u723e\u985e\u578b\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u8b80\u6027\uff0c\u5f9e\u800c\u66f4\u597d\u5730\u6eff\u8db3\u696d\u52d9\u9700\u6c42\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u512a\u5316\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u642d\u5efa\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u4eab\u53d7\u9ad8\u6548\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u6578\u64da\u5eabbool\u7684\u539f\u7406\u8207\u61c9\u7528\uff0c\u4e86\u89e3\u5176\u5728\u6578\u64da\u67e5\u8a62\u548c\u7ba1\u7406\u4e2d\u7684\u91cd\u8981\u6027\u53ca\u5be6\u969b\u6848\u4f8b\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-185942","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185942","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=185942"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185942\/revisions"}],"predecessor-version":[{"id":185943,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185942\/revisions\/185943"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=185942"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=185942"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=185942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}