{"id":160695,"date":"2024-11-04T00:14:35","date_gmt":"2024-11-03T16:14:35","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160695\/"},"modified":"2024-11-04T00:14:36","modified_gmt":"2024-11-03T16:14:36","slug":"sqlite-%e6%95%99%e7%a8%8b%ef%bc%9asqlite-where-%e5%ad%90%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160695\/","title":{"rendered":"SQLITE \u6559\u7a0b\uff1aSQLite Where \u5b50\u53e5"},"content":{"rendered":"<h1 id=\"sqlite-%e6%95%99%e7%a8%8b%ef%bc%9asqlite-where-%e5%ad%90%e5%8f%a5-gLpePrrCfJ\">SQLITE \u6559\u7a0b\uff1aSQLite Where \u5b50\u53e5<\/h1>\n<p>\u5728\u4f7f\u7528 SQLite \u9032\u884c\u8cc7\u6599\u5eab\u67e5\u8a62\u6642\uff0c<code>WHERE<\/code> \u5b50\u53e5\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u5de5\u5177\u3002\u5b83\u5141\u8a31\u7528\u6236\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u904e\u6ffe\u67e5\u8a62\u7d50\u679c\uff0c\u5f9e\u800c\u7372\u5f97\u66f4\u7cbe\u78ba\u7684\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e SQLite \u7684 <code>WHERE<\/code> \u5b50\u53e5\uff0c\u5305\u62ec\u5176\u8a9e\u6cd5\u3001\u4f7f\u7528\u7bc4\u4f8b\u4ee5\u53ca\u4e00\u4e9b\u5e38\u898b\u7684\u61c9\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"1-sqlite-where-%e5%ad%90%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-gLpePrrCfJ\">1. SQLite WHERE \u5b50\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728 SQLite \u4e2d\uff0c<code>WHERE<\/code> \u5b50\u53e5\u901a\u5e38\u8207 <code>SELECT<\/code>\u3001<code>UPDATE<\/code> \u548c <code>DELETE<\/code> \u8a9e\u53e5\u4e00\u8d77\u4f7f\u7528\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2, ...\nFROM table_name\nWHERE condition;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>condition<\/code> \u662f\u7528\u4f86\u904e\u6ffe\u6578\u64da\u7684\u689d\u4ef6\u8868\u9054\u5f0f\u3002\u53ea\u6709\u6eff\u8db3\u8a72\u689d\u4ef6\u7684\u8a18\u9304\u624d\u6703\u88ab\u9078\u4e2d\u3002<\/p>\n<h2 id=\"2-%e4%bd%bf%e7%94%a8-where-%e5%ad%90%e5%8f%a5%e7%9a%84%e7%af%84%e4%be%8b-gLpePrrCfJ\">2. \u4f7f\u7528 WHERE \u5b50\u53e5\u7684\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\u7684\u7bc4\u4f8b\uff1a<\/p>\n<h3 id=\"2-1-%e5%9f%ba%e6%9c%ac%e6%9f%a5%e8%a9%a2-gLpePrrCfJ\">2.1 \u57fa\u672c\u67e5\u8a62<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\u683c\uff0c\u5305\u542b\u54e1\u5de5\u7684\u59d3\u540d\u548c\u5e74\u9f61\u3002\u82e5\u8981\u67e5\u8a62\u5e74\u9f61\u5927\u65bc 30 \u6b72\u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM employees\nWHERE age &gt; 30;<\/code><\/pre>\n<h3 id=\"2-2-%e5%a4%9a%e6%a2%9d%e4%bb%b6%e6%9f%a5%e8%a9%a2-gLpePrrCfJ\">2.2 \u591a\u689d\u4ef6\u67e5\u8a62<\/h3>\n<p>\u6211\u5011\u4e5f\u53ef\u4ee5\u4f7f\u7528\u908f\u8f2f\u904b\u7b97\u7b26\uff08\u5982 <code>AND<\/code> \u548c <code>OR<\/code>\uff09\u4f86\u7d44\u5408\u591a\u500b\u689d\u4ef6\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u5e74\u9f61\u5927\u65bc 30 \u4e14\u90e8\u9580\u70ba\u300c\u92b7\u552e\u300d\u7684\u54e1\u5de5\uff1a<\/p>\n<pre><code>SELECT * FROM employees\nWHERE age &gt; 30 AND department = 'Sales';<\/code><\/pre>\n<h3 id=\"2-3-%e4%bd%bf%e7%94%a8-like-%e9%80%b2%e8%a1%8c%e6%a8%a1%e7%b3%8a%e6%9f%a5%e8%a9%a2-gLpePrrCfJ\">2.3 \u4f7f\u7528 LIKE \u9032\u884c\u6a21\u7cca\u67e5\u8a62<\/h3>\n<p>\u5982\u679c\u6211\u5011\u60f3\u67e5\u8a62\u59d3\u540d\u4e2d\u5305\u542b\u300cJohn\u300d\u7684\u6240\u6709\u54e1\u5de5\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>LIKE<\/code> \u95dc\u9375\u5b57\uff1a<\/p>\n<pre><code>SELECT * FROM employees\nWHERE name LIKE '%John%';<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>%<\/code> \u662f\u901a\u914d\u7b26\uff0c\u8868\u793a\u4efb\u610f\u6578\u91cf\u7684\u5b57\u7b26\u3002<\/p>\n<h2 id=\"3-where-%e5%ad%90%e5%8f%a5%e4%b8%ad%e7%9a%84%e5%85%b6%e4%bb%96%e9%81%8b%e7%ae%97%e7%ac%a6-gLpePrrCfJ\">3. WHERE \u5b50\u53e5\u4e2d\u7684\u5176\u4ed6\u904b\u7b97\u7b26<\/h2>\n<p>\u9664\u4e86\u57fa\u672c\u7684\u6bd4\u8f03\u904b\u7b97\u7b26\uff08\u5982 <code>=<\/code>\u3001<code>!=<\/code>\u3001<code>&gt;<\/code>\u3001<code>&lt;<\/code> \u7b49\uff09\uff0c<code>WHERE<\/code> \u5b50\u53e5\u9084\u652f\u6301\u5176\u4ed6\u4e00\u4e9b\u904b\u7b97\u7b26\uff1a<\/p>\n<ul>\n<li><code>BETWEEN<\/code>\uff1a\u7528\u65bc\u67e5\u8a62\u67d0\u500b\u7bc4\u570d\u5167\u7684\u503c\u3002<\/li>\n<li><code>IN<\/code>\uff1a\u7528\u65bc\u67e5\u8a62\u67d0\u500b\u503c\u662f\u5426\u5728\u4e00\u7d44\u503c\u4e2d\u3002<\/li>\n<li><code>IS NULL<\/code>\uff1a\u7528\u65bc\u67e5\u8a62\u67d0\u500b\u5b57\u6bb5\u662f\u5426\u70ba\u7a7a\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u67e5\u8a62\u5e74\u9f61\u5728 25 \u5230 35 \u6b72\u4e4b\u9593\u7684\u54e1\u5de5\uff1a<\/p>\n<pre><code>SELECT * FROM employees\nWHERE age BETWEEN 25 AND 35;<\/code><\/pre>\n<h2 id=\"4-%e5%b0%8f%e7%b5%90-gLpePrrCfJ\">4. \u5c0f\u7d50<\/h2>\n<p>SQLite \u7684 <code>WHERE<\/code> \u5b50\u53e5\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u7cbe\u78ba\u5730\u904e\u6ffe\u67e5\u8a62\u7d50\u679c\u3002\u901a\u904e\u4f7f\u7528\u4e0d\u540c\u7684\u689d\u4ef6\u548c\u904b\u7b97\u7b26\uff0c\u7528\u6236\u53ef\u4ee5\u9748\u6d3b\u5730\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\u3002\u7121\u8ad6\u662f\u5728\u65e5\u5e38\u7684\u6578\u64da\u67e5\u8a62\u9084\u662f\u8907\u96dc\u7684\u6578\u64da\u5206\u6790\u4e2d\uff0c<code>WHERE<\/code> \u5b50\u53e5\u90fd\u626e\u6f14\u8457\u4e0d\u53ef\u6216\u7f3a\u7684\u89d2\u8272\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u60a8\u7684\u61c9\u7528\u4e2d\u4f7f\u7528 SQLite \u6216\u8005\u9700\u8981\u66f4\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u65b9\u6848\u611f\u8208\u8da3\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u4f86\u63d0\u5347\u60a8\u7684\u6578\u64da\u5eab\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b66\u4e60SQLite Where\u5b50\u53e5\u7684\u7528\u6cd5\uff0c\u638c\u63e1\u5982\u4f55\u5728\u67e5\u8be2\u4e2d\u7b5b\u9009\u6570\u636e\uff0c\u63d0\u9ad8\u6570\u636e\u5e93\u64cd\u4f5c\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-160695","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160695","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=160695"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160695\/revisions"}],"predecessor-version":[{"id":160696,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160695\/revisions\/160696"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160695"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160695"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}