{"id":160719,"date":"2024-11-04T00:26:24","date_gmt":"2024-11-03T16:26:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160719\/"},"modified":"2024-11-04T00:26:25","modified_gmt":"2024-11-03T16:26:25","slug":"sqlite-%e6%95%99%e7%a8%8b%ef%bc%9asqlite-%e7%b4%a2%e5%bc%95%ef%bc%88index%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160719\/","title":{"rendered":"SQLITE \u6559\u7a0b\uff1aSQLite \u7d22\u5f15\uff08Index\uff09"},"content":{"rendered":"<h1 id=\"sqlite-%e6%95%99%e7%a8%8b%ef%bc%9asqlite-%e7%b4%a2%e5%bc%95%ef%bc%88index%ef%bc%89-YpKMGZuWny\">SQLITE \u6559\u7a0b\uff1aSQLite \u7d22\u5f15\uff08Index\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u6578\u64da\u7d50\u69cb\uff0c\u7528\u65bc\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002SQLite \u4f5c\u70ba\u4e00\u500b\u8f15\u91cf\u7d1a\u7684\u8cc7\u6599\u5eab\u5f15\u64ce\uff0c\u63d0\u4f9b\u4e86\u7d22\u5f15\u7684\u529f\u80fd\uff0c\u5e6b\u52a9\u7528\u6236\u66f4\u5feb\u901f\u5730\u6aa2\u7d22\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e SQLite \u7684\u7d22\u5f15\uff0c\u5305\u62ec\u5176\u57fa\u672c\u6982\u5ff5\u3001\u5275\u5efa\u65b9\u6cd5\u3001\u4f7f\u7528\u5834\u666f\u53ca\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%b4%a2%e5%bc%95%ef%bc%9f-YpKMGZuWny\">\u4ec0\u9ebc\u662f\u7d22\u5f15\uff1f<\/h2>\n<p>\u7d22\u5f15\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u901a\u5e38\u7528\u65bc\u52a0\u901f\u67e5\u8a62\u64cd\u4f5c\u3002\u5b83\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u80fd\u5920\u5e6b\u52a9\u8cc7\u6599\u5eab\u5feb\u901f\u5b9a\u4f4d\u5230\u6240\u9700\u7684\u6578\u64da\u3002\u7576\u8cc7\u6599\u8868\u4e2d\u7684\u6578\u64da\u91cf\u589e\u5927\u6642\uff0c\u6c92\u6709\u7d22\u5f15\u7684\u67e5\u8a62\u53ef\u80fd\u6703\u8b8a\u5f97\u975e\u5e38\u7de9\u6162\uff0c\u56e0\u70ba\u8cc7\u6599\u5eab\u9700\u8981\u9010\u884c\u6383\u63cf\u6574\u500b\u8868\u683c\u3002<\/p>\n<h2 id=\"sqlite-%e4%b8%ad%e7%9a%84%e7%b4%a2%e5%bc%95%e9%a1%9e%e5%9e%8b-YpKMGZuWny\">SQLite \u4e2d\u7684\u7d22\u5f15\u985e\u578b<\/h2>\n<p>SQLite \u652f\u6301\u5e7e\u7a2e\u4e0d\u540c\u985e\u578b\u7684\u7d22\u5f15\uff0c\u4e3b\u8981\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u55ae\u5217\u7d22\u5f15\uff1a<\/strong>\u91dd\u5c0d\u8868\u4e2d\u7684\u55ae\u4e00\u5217\u5275\u5efa\u7684\u7d22\u5f15\u3002<\/li>\n<li><strong>\u591a\u5217\u7d22\u5f15\uff1a<\/strong>\u91dd\u5c0d\u8868\u4e2d\u7684\u591a\u500b\u5217\u5275\u5efa\u7684\u7d22\u5f15\uff0c\u901a\u5e38\u7528\u65bc\u8907\u5408\u67e5\u8a62\u3002<\/li>\n<li><strong>\u552f\u4e00\u7d22\u5f15\uff1a<\/strong>\u78ba\u4fdd\u7d22\u5f15\u5217\u4e2d\u7684\u6240\u6709\u503c\u90fd\u662f\u552f\u4e00\u7684\uff0c\u9019\u5c0d\u65bc\u4fdd\u6301\u6578\u64da\u5b8c\u6574\u6027\u975e\u5e38\u91cd\u8981\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%89%b5%e5%bb%ba%e7%b4%a2%e5%bc%95-YpKMGZuWny\">\u5982\u4f55\u5275\u5efa\u7d22\u5f15<\/h2>\n<p>\u5728 SQLite \u4e2d\uff0c\u5275\u5efa\u7d22\u5f15\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE INDEX index_name ON table_name (column1, column2, ...);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\u683c\uff0c\u4e26\u5e0c\u671b\u5728 <code>last_name<\/code> \u5217\u4e0a\u5275\u5efa\u4e00\u500b\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE INDEX idx_last_name ON employees (last_name);<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95%e7%9a%84%e5%a0%b4%e6%99%af-YpKMGZuWny\">\u4f7f\u7528\u7d22\u5f15\u7684\u5834\u666f<\/h2>\n<p>\u7d22\u5f15\u5728\u4ee5\u4e0b\u60c5\u6cc1\u4e0b\u7279\u5225\u6709\u7528\uff1a<\/p>\n<ul>\n<li>\u7576\u67e5\u8a62\u6d89\u53ca\u5230 <code>WHERE<\/code> \u5b50\u53e5\u6642\uff0c\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002<\/li>\n<li>\u7576\u9700\u8981\u5c0d\u67d0\u4e00\u5217\u9032\u884c\u6392\u5e8f\uff08\u4f8b\u5982 <code>ORDER BY<\/code>\uff09\u6642\uff0c\u7d22\u5f15\u53ef\u4ee5\u52a0\u5feb\u6392\u5e8f\u904e\u7a0b\u3002<\/li>\n<li>\u5728\u9032\u884c\u806f\u63a5\u64cd\u4f5c\u6642\uff0c\u7d22\u5f15\u53ef\u4ee5\u5e6b\u52a9\u5feb\u901f\u627e\u5230\u5339\u914d\u7684\u884c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-YpKMGZuWny\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u96d6\u7136\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u4f46\u904e\u591a\u7684\u7d22\u5f15\u4e5f\u53ef\u80fd\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u56e0\u70ba\u6bcf\u6b21\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u64cd\u4f5c\u90fd\u9700\u8981\u66f4\u65b0\u7d22\u5f15\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li>\u50c5\u5728\u7d93\u5e38\u67e5\u8a62\u7684\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\u3002<\/li>\n<li>\u907f\u514d\u5728\u7d93\u5e38\u8b8a\u66f4\u7684\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u548c\u7dad\u8b77\u7d22\u5f15\uff0c\u4ee5\u78ba\u4fdd\u5176\u6709\u6548\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-YpKMGZuWny\">\u7e3d\u7d50<\/h2>\n<p>SQLite \u7684\u7d22\u5f15\u529f\u80fd\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u91cd\u8981\u5de5\u5177\u3002\u901a\u904e\u5408\u7406\u5730\u4f7f\u7528\u7d22\u5f15\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u986f\u8457\u6539\u5584\u61c9\u7528\u7a0b\u5e8f\u7684\u97ff\u61c9\u901f\u5ea6\u548c\u7528\u6236\u9ad4\u9a57\u3002\u4e86\u89e3\u5982\u4f55\u5275\u5efa\u548c\u7ba1\u7406\u7d22\u5f15\uff0c\u4e26\u9075\u5faa\u6700\u4f73\u5be6\u8e10\uff0c\u5c07\u6709\u52a9\u65bc\u5728\u4f7f\u7528 SQLite \u6642\u7372\u5f97\u6700\u4f73\u6027\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002\u7121\u8ad6\u662f\u500b\u4eba\u9805\u76ee\u9084\u662f\u4f01\u696d\u61c9\u7528\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b66\u4e60SQLite\u7d22\u5f15\u7684\u57fa\u672c\u6982\u5ff5\u3001\u521b\u5efa\u65b9\u6cd5\u53ca\u4f18\u5316\u67e5\u8be2\u6027\u80fd\u7684\u6280\u5de7\uff0c\u63d0\u5347\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-160719","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160719","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=160719"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160719\/revisions"}],"predecessor-version":[{"id":160720,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160719\/revisions\/160720"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160719"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160719"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160719"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}