{"id":165859,"date":"2024-11-05T13:26:18","date_gmt":"2024-11-05T05:26:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/165859\/"},"modified":"2024-11-05T13:26:18","modified_gmt":"2024-11-05T05:26:18","slug":"%e5%bf%ab%e9%80%9f%e6%9f%a5%e8%a9%a2%e5%89%8d%e4%b8%89%e6%89%8b%e6%a9%9f%e8%99%9f%e7%a2%bc%ef%bc%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8a%80%e5%b7%a7%e6%95%99%e7%a8%8b-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/165859\/","title":{"rendered":"\u5feb\u901f\u67e5\u8a62\u524d\u4e09\u624b\u6a5f\u865f\u78bc\uff1a\u6578\u64da\u5eab\u6280\u5de7\u6559\u7a0b (\u6578\u64da\u5eab\u67e5\u8a62\u524d\u4e09\u624b\u6a5f\u865f\u78bc)"},"content":{"rendered":"<h1 id=\"%e5%bf%ab%e9%80%9f%e6%9f%a5%e8%a9%a2%e5%89%8d%e4%b8%89%e6%89%8b%e6%a9%9f%e8%99%9f%e7%a2%bc%ef%bc%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8a%80%e5%b7%a7%e6%95%99%e7%a8%8b-LzWxbIJWTD\">\u5feb\u901f\u67e5\u8a62\u524d\u4e09\u624b\u6a5f\u865f\u78bc\uff1a\u6578\u64da\u5eab\u6280\u5de7\u6559\u7a0b<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u5b57\u5316\u7684\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u666e\u904d\u3002\u7121\u8ad6\u662f\u4f01\u696d\u9084\u662f\u500b\u4eba\uff0c\u6578\u64da\u5eab\u90fd\u80fd\u5e6b\u52a9\u6211\u5011\u6709\u6548\u5730\u7ba1\u7406\u548c\u67e5\u8a62\u4fe1\u606f\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5feb\u901f\u67e5\u8a62\u6578\u64da\u5eab\u4e2d\u7684\u524d\u4e09\u500b\u624b\u6a5f\u865f\u78bc\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u6280\u5de7\u548c\u793a\u4f8b\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%9f%ba%e7%a4%8e%e7%9f%a5%e8%ad%98-LzWxbIJWTD\">\u6578\u64da\u5eab\u57fa\u790e\u77e5\u8b58<\/h2>\n<p>\u6578\u64da\u5eab\u662f\u4e00\u7a2e\u6709\u7d44\u7e54\u7684\u6578\u64da\u96c6\u5408\uff0c\u901a\u5e38\u7528\u65bc\u5b58\u5132\u548c\u6aa2\u7d22\u4fe1\u606f\u3002\u5e38\u898b\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u5305\u62ec MySQL\u3001PostgreSQL \u548c SQLite \u7b49\u3002\u9019\u4e9b\u7cfb\u7d71\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u67e5\u8a62\u8a9e\u8a00\uff0c\u5982 SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\uff0c\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u65b9\u4fbf\u5730\u9032\u884c\u6578\u64da\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e6%89%8b%e6%a9%9f%e8%99%9f%e7%a2%bc%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%ad%a5%e9%a9%9f-LzWxbIJWTD\">\u67e5\u8a62\u624b\u6a5f\u865f\u78bc\u7684\u57fa\u672c\u6b65\u9a5f<\/h2>\n<p>\u5728\u67e5\u8a62\u624b\u6a5f\u865f\u78bc\u4e4b\u524d\uff0c\u6211\u5011\u9700\u8981\u78ba\u4fdd\u6578\u64da\u5eab\u4e2d\u5df2\u7d93\u5b58\u5728\u76f8\u95dc\u7684\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u67e5\u8a62\u524d\u4e09\u500b\u624b\u6a5f\u865f\u78bc\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<ol>\n<li>\u9023\u63a5\u5230\u6578\u64da\u5eab\u3002<\/li>\n<li>\u7de8\u5beb SQL \u67e5\u8a62\u8a9e\u53e5\u3002<\/li>\n<li>\u57f7\u884c\u67e5\u8a62\u4e26\u7372\u53d6\u7d50\u679c\u3002<\/li>\n<\/ol>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e4%bd%bf%e7%94%a8-mysql-%e6%9f%a5%e8%a9%a2%e5%89%8d%e4%b8%89%e5%80%8b%e6%89%8b%e6%a9%9f%e8%99%9f%e7%a2%bc-LzWxbIJWTD\">\u793a\u4f8b\uff1a\u4f7f\u7528 MySQL \u67e5\u8a62\u524d\u4e09\u500b\u624b\u6a5f\u865f\u78bc<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 MySQL \u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u67e5\u8a62\u6578\u64da\u5eab\u4e2d\u7684\u524d\u4e09\u500b\u624b\u6a5f\u865f\u78bc\uff1a<\/p>\n<pre><code>-- \u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba users \u7684\u8868\uff0c\u4e26\u4e14\u6709\u4e00\u500b phone_number \u5217\nSELECT phone_number \nFROM users \nORDER BY phone_number \nLIMIT 3;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u5f9e\u540d\u70ba <code>users<\/code> \u7684\u8868\u4e2d\u9078\u64c7 <code>phone_number<\/code> \u5217\uff0c\u4e26\u6839\u64da\u624b\u6a5f\u865f\u78bc\u9032\u884c\u6392\u5e8f\uff0c\u6700\u5f8c\u9650\u5236\u7d50\u679c\u70ba\u524d\u4e09\u500b\u3002<\/p>\n<h2 id=\"%e9%80%b2%e9%9a%8e%e6%8a%80%e5%b7%a7%ef%bc%9a%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95%e6%8f%90%e9%ab%98%e6%9f%a5%e8%a9%a2%e6%95%88%e7%8e%87-LzWxbIJWTD\">\u9032\u968e\u6280\u5de7\uff1a\u4f7f\u7528\u7d22\u5f15\u63d0\u9ad8\u67e5\u8a62\u6548\u7387<\/h2>\n<p>\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u67e5\u8a62\u6548\u7387\u53ef\u80fd\u6703\u6210\u70ba\u4e00\u500b\u554f\u984c\u3002\u70ba\u4e86\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\uff0c\u53ef\u4ee5\u8003\u616e\u5728 <code>phone_number<\/code> \u5217\u4e0a\u5275\u5efa\u7d22\u5f15\u3002\u9019\u6a23\u53ef\u4ee5\u52a0\u5feb\u67e5\u8a62\u7684\u901f\u5ea6\uff0c\u7279\u5225\u662f\u5728\u6578\u64da\u91cf\u8f03\u5927\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n<pre><code>-- \u5275\u5efa\u7d22\u5f15\u7684 SQL \u8a9e\u53e5\nCREATE INDEX idx_phone_number \nON users (phone_number);\n<\/code><\/pre>\n<p>\u901a\u904e\u5275\u5efa\u7d22\u5f15\uff0c\u6578\u64da\u5eab\u53ef\u4ee5\u66f4\u5feb\u5730\u5b9a\u4f4d\u5230\u9700\u8981\u7684\u6578\u64da\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<h2 id=\"%e8%99%95%e7%90%86%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c-LzWxbIJWTD\">\u8655\u7406\u67e5\u8a62\u7d50\u679c<\/h2>\n<p>\u57f7\u884c\u67e5\u8a62\u5f8c\uff0c\u6211\u5011\u9700\u8981\u8655\u7406\u67e5\u8a62\u7d50\u679c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728 PHP \u4e2d\u8655\u7406\u67e5\u8a62\u7d50\u679c\uff1a<\/p>\n<pre><code>&lt;?php\n\/\/ \u5047\u8a2d\u5df2\u7d93\u5efa\u7acb\u4e86\u6578\u64da\u5eab\u9023\u63a5\n$result = mysqli_query($conn, \"SELECT phone_number FROM users ORDER BY phone_number LIMIT 3\");\n\nwhile ($row = mysqli_fetch_assoc($result)) {\n    echo $row['phone_number'] . \"&lt;br&gt;\";\n}\n?&gt;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 PHP \u7684 <code>mysqli_fetch_assoc<\/code> \u51fd\u6578\u4f86\u7372\u53d6\u67e5\u8a62\u7d50\u679c\uff0c\u4e26\u5c07\u6bcf\u500b\u624b\u6a5f\u865f\u78bc\u8f38\u51fa\u5230\u7db2\u9801\u4e0a\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-LzWxbIJWTD\">\u7e3d\u7d50<\/h2>\n<p>\u5feb\u901f\u67e5\u8a62\u6578\u64da\u5eab\u4e2d\u7684\u524d\u4e09\u500b\u624b\u6a5f\u865f\u78bc\u662f\u4e00\u500b\u76f8\u5c0d\u7c21\u55ae\u7684\u904e\u7a0b\uff0c\u53ea\u9700\u5e7e\u500b\u6b65\u9a5f\u5373\u53ef\u5b8c\u6210\u3002\u901a\u904e\u4f7f\u7528 SQL \u67e5\u8a62\u8a9e\u8a00\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6240\u9700\u7684\u4fe1\u606f\u3002\u6b64\u5916\uff0c\u901a\u904e\u5275\u5efa\u7d22\u5f15\u7b49\u6280\u8853\uff0c\u6211\u5011\u9084\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u6216\u5176\u4ed6 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5feb\u901f\u67e5\u8a62\u6578\u64da\u5eab\u4e2d\u7684\u524d\u4e09\u624b\u6a5f\u865f\u78bc\uff0c\u638c\u63e1\u5be6\u7528\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u6aa2\u7d22\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-165859","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/165859","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=165859"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/165859\/revisions"}],"predecessor-version":[{"id":165860,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/165859\/revisions\/165860"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=165859"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=165859"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=165859"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}