{"id":160697,"date":"2024-11-04T00:15:24","date_gmt":"2024-11-03T16:15:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160697\/"},"modified":"2024-11-04T00:15:24","modified_gmt":"2024-11-03T16:15:24","slug":"sqlite-%e6%95%99%e7%a8%8b%ef%bc%9asqlite-%e8%a1%a8%e9%81%94%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160697\/","title":{"rendered":"SQLITE \u6559\u7a0b\uff1aSQLite \u8868\u9054\u5f0f"},"content":{"rendered":"<h1 id=\"sqlite-%e6%95%99%e7%a8%8b%ef%bc%9asqlite-%e8%a1%a8%e9%81%94%e5%bc%8f-fZomAdmbag\">SQLITE \u6559\u7a0b\uff1aSQLite \u8868\u9054\u5f0f<\/h1>\n<p>SQLite \u662f\u4e00\u500b\u8f15\u91cf\u7d1a\u7684\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5f0f\u4e2d\uff0c\u7279\u5225\u662f\u5728\u79fb\u52d5\u8a2d\u5099\u548c\u5d4c\u5165\u5f0f\u7cfb\u7d71\u4e2d\u3002SQLite \u7684\u4e00\u500b\u91cd\u8981\u7279\u6027\u662f\u5176\u652f\u6301\u7684\u8868\u9054\u5f0f\uff0c\u9019\u4e9b\u8868\u9054\u5f0f\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u9032\u884c\u8907\u96dc\u7684\u67e5\u8a62\u548c\u6578\u64da\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e SQLite \u8868\u9054\u5f0f\u7684\u57fa\u672c\u6982\u5ff5\u3001\u985e\u578b\u53ca\u5176\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-sqlite-%e8%a1%a8%e9%81%94%e5%bc%8f%ef%bc%9f-fZomAdmbag\">\u4ec0\u9ebc\u662f SQLite \u8868\u9054\u5f0f\uff1f<\/h2>\n<p>\u5728 SQLite \u4e2d\uff0c\u8868\u9054\u5f0f\u662f\u7531\u904b\u7b97\u7b26\u3001\u5e38\u6578\u3001\u8b8a\u6578\u548c\u51fd\u6578\u7d44\u6210\u7684\u7d44\u5408\uff0c\u7528\u65bc\u8a08\u7b97\u503c\u6216\u9032\u884c\u6578\u64da\u64cd\u4f5c\u3002\u8868\u9054\u5f0f\u53ef\u4ee5\u7528\u65bc SELECT \u8a9e\u53e5\u3001WHERE \u5b50\u53e5\u3001ORDER BY \u5b50\u53e5\u7b49\u591a\u500b\u5730\u65b9\u3002\u5b83\u5011\u662f SQL \u67e5\u8a62\u7684\u6838\u5fc3\uff0c\u5e6b\u52a9\u7528\u6236\u5f9e\u8cc7\u6599\u5eab\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002<\/p>\n<h2 id=\"sqlite-%e8%a1%a8%e9%81%94%e5%bc%8f%e7%9a%84%e9%a1%9e%e5%9e%8b-fZomAdmbag\">SQLite \u8868\u9054\u5f0f\u7684\u985e\u578b<\/h2>\n<p>SQLite \u652f\u6301\u591a\u7a2e\u4e0d\u540c\u985e\u578b\u7684\u8868\u9054\u5f0f\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>\u7b97\u8853\u8868\u9054\u5f0f\uff1a<\/strong>\u9019\u4e9b\u8868\u9054\u5f0f\u7528\u65bc\u57f7\u884c\u6578\u5b78\u904b\u7b97\uff0c\u4f8b\u5982\u52a0\u6cd5\u3001\u6e1b\u6cd5\u3001\u4e58\u6cd5\u548c\u9664\u6cd5\u3002<code>SELECT 1 + 1;<\/code> \u5c07\u8fd4\u56de 2\u3002<\/li>\n<li><strong>\u6bd4\u8f03\u8868\u9054\u5f0f\uff1a<\/strong>\u9019\u4e9b\u8868\u9054\u5f0f\u7528\u65bc\u6bd4\u8f03\u5169\u500b\u503c\uff0c\u8fd4\u56de\u5e03\u6797\u503c\uff08\u771f\u6216\u5047\uff09\u3002\u4f8b\u5982\uff0c<code>SELECT * FROM users WHERE age &gt; 18;<\/code> \u5c07\u8fd4\u56de\u6240\u6709\u5e74\u9f61\u5927\u65bc 18 \u7684\u7528\u6236\u3002<\/li>\n<li><strong>\u908f\u8f2f\u8868\u9054\u5f0f\uff1a<\/strong>\u9019\u4e9b\u8868\u9054\u5f0f\u7528\u65bc\u7d50\u5408\u591a\u500b\u689d\u4ef6\uff0c\u4f7f\u7528 AND\u3001OR \u548c NOT \u7b49\u904b\u7b97\u7b26\u3002\u4f8b\u5982\uff0c<code>SELECT * FROM users WHERE age &gt; 18 AND city = 'Hong Kong';<\/code><\/li>\n<li><strong>\u5b57\u4e32\u8868\u9054\u5f0f\uff1a<\/strong>\u9019\u4e9b\u8868\u9054\u5f0f\u7528\u65bc\u64cd\u4f5c\u5b57\u4e32\uff0c\u4f8b\u5982\u9023\u63a5\u548c\u6bd4\u8f03\u3002<code>SELECT 'Hello ' || 'World';<\/code> \u5c07\u8fd4\u56de &#8216;Hello World&#8217;\u3002<\/li>\n<li><strong>\u51fd\u6578\u8868\u9054\u5f0f\uff1a<\/strong>SQLite \u63d0\u4f9b\u4e86\u591a\u7a2e\u5167\u5efa\u51fd\u6578\uff0c\u4f8b\u5982\u805a\u5408\u51fd\u6578\uff08\u5982 COUNT\u3001SUM\uff09\u548c\u5b57\u7b26\u4e32\u51fd\u6578\uff08\u5982 LENGTH\u3001UPPER\uff09\u3002\u4f8b\u5982\uff0c<code>SELECT COUNT(*) FROM users;<\/code> \u5c07\u8fd4\u56de\u7528\u6236\u8868\u4e2d\u7684\u7e3d\u884c\u6578\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8-sqlite-%e8%a1%a8%e9%81%94%e5%bc%8f%e7%9a%84%e7%af%84%e4%be%8b-fZomAdmbag\">\u4f7f\u7528 SQLite \u8868\u9054\u5f0f\u7684\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528 SQLite \u8868\u9054\u5f0f\u7684\u7bc4\u4f8b\uff1a<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-1%ef%bc%9a%e5%9f%ba%e6%9c%ac%e7%ae%97%e8%a1%93%e9%81%8b%e7%ae%97-fZomAdmbag\">\u7bc4\u4f8b 1\uff1a\u57fa\u672c\u7b97\u8853\u904b\u7b97<\/h3>\n<pre><code>SELECT price, quantity, price * quantity AS total FROM orders;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6bcf\u500b\u8a02\u55ae\u7684\u50f9\u683c\u3001\u6578\u91cf\u4ee5\u53ca\u7e3d\u91d1\u984d\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-2%ef%bc%9a%e4%bd%bf%e7%94%a8%e6%af%94%e8%bc%83%e8%a1%a8%e9%81%94%e5%bc%8f-fZomAdmbag\">\u7bc4\u4f8b 2\uff1a\u4f7f\u7528\u6bd4\u8f03\u8868\u9054\u5f0f<\/h3>\n<pre><code>SELECT * FROM products WHERE stock &gt; 0;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u5eab\u5b58\u5927\u65bc 0 \u7684\u7522\u54c1\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-3%ef%bc%9a%e9%82%8f%e8%bc%af%e8%a1%a8%e9%81%94%e5%bc%8f%e7%9a%84%e6%87%89%e7%94%a8-fZomAdmbag\">\u7bc4\u4f8b 3\uff1a\u908f\u8f2f\u8868\u9054\u5f0f\u7684\u61c9\u7528<\/h3>\n<pre><code>SELECT * FROM employees WHERE department = 'Sales' OR department = 'Marketing';<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u5728\u92b7\u552e\u6216\u5e02\u5834\u90e8\u9580\u5de5\u4f5c\u7684\u54e1\u5de5\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-4%ef%bc%9a%e5%ad%97%e4%b8%b2%e6%93%8d%e4%bd%9c-fZomAdmbag\">\u7bc4\u4f8b 4\uff1a\u5b57\u4e32\u64cd\u4f5c<\/h3>\n<pre><code>SELECT name, UPPER(name) AS upper_name FROM users;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u7528\u6236\u7684\u540d\u5b57\u53ca\u5176\u5927\u5beb\u5f62\u5f0f\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-fZomAdmbag\">\u7e3d\u7d50<\/h2>\n<p>SQLite \u8868\u9054\u5f0f\u662f\u9032\u884c\u6578\u64da\u67e5\u8a62\u548c\u64cd\u4f5c\u7684\u5f37\u5927\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u9ad8\u6548\u5730\u5f9e\u8cc7\u6599\u5eab\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u7121\u8ad6\u662f\u9032\u884c\u57fa\u672c\u7684\u7b97\u8853\u904b\u7b97\uff0c\u9084\u662f\u4f7f\u7528\u8907\u96dc\u7684\u908f\u8f2f\u689d\u4ef6\uff0cSQLite \u90fd\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u8868\u9054\u5f0f\u652f\u6301\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u53ef\u4ee5\u9032\u4e00\u6b65\u63d0\u5347\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002\u4e86\u89e3 SQLite \u7684\u8868\u9054\u5f0f\u5c07\u6709\u52a9\u65bc\u958b\u767c\u8005\u66f4\u597d\u5730\u5229\u7528\u9019\u4e00\u8cc7\u6599\u5eab\u7cfb\u7d71\uff0c\u5be6\u73fe\u66f4\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2 SQLite \u8868\u9054\u5f0f\u7684\u57fa\u672c\u6982\u5ff5\u548c\u7528\u6cd5\uff0c\u638c\u63e1\u5982\u4f55\u5728 SQLite \u4e2d\u9032\u884c\u6578\u64da\u67e5\u8a62\u548c\u64cd\u4f5c\u7684\u6280\u5de7\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-160697","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160697","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=160697"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160697\/revisions"}],"predecessor-version":[{"id":160698,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160697\/revisions\/160698"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160697"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160697"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}