{"id":180138,"date":"2024-11-09T07:43:15","date_gmt":"2024-11-08T23:43:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180138\/"},"modified":"2024-11-09T07:43:15","modified_gmt":"2024-11-08T23:43:15","slug":"%e4%b8%89%e7%a8%aesql%e5%88%86%e9%a0%81%e8%aa%9e%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180138\/","title":{"rendered":"\u4e09\u7a2eSQL\u5206\u9801\u8a9e\u53e5"},"content":{"rendered":"<h1 id=\"%e4%b8%89%e7%a8%aesql%e5%88%86%e9%a0%81%e8%aa%9e%e5%8f%a5-oYsBBUnWhx\">\u4e09\u7a2eSQL\u5206\u9801\u8a9e\u53e5<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u5206\u9801\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002\u5206\u9801\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u66f4\u6709\u6548\u5730\u700f\u89bd\u6578\u64da\uff0c\u4e26\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u4e09\u7a2e\u5e38\u898b\u7684SQL\u5206\u9801\u8a9e\u53e5\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"1-%e4%bd%bf%e7%94%a8limit%e5%92%8coffset-oYsBBUnWhx\">1. \u4f7f\u7528LIMIT\u548cOFFSET<\/h2>\n<p>\u5728MySQL\u548cPostgreSQL\u4e2d\uff0c\u6700\u5e38\u898b\u7684\u5206\u9801\u65b9\u6cd5\u662f\u4f7f\u7528LIMIT\u548cOFFSET\u8a9e\u53e5\u3002LIMIT\u7528\u65bc\u9650\u5236\u67e5\u8a62\u7d50\u679c\u7684\u6578\u91cf\uff0c\u800cOFFSET\u5247\u6307\u5b9a\u5f9e\u54ea\u4e00\u689d\u8a18\u9304\u958b\u59cb\u8fd4\u56de\u7d50\u679c\u3002<\/p>\n<pre><code>SELECT * FROM \u8868\u540d\nLIMIT \u6bcf\u9801\u986f\u793a\u7684\u8a18\u9304\u6578 OFFSET \u7576\u524d\u9801\u6578 * \u6bcf\u9801\u986f\u793a\u7684\u8a18\u9304\u6578;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u6bcf\u9801\u986f\u793a10\u689d\u8a18\u9304\uff0c\u4e26\u4e14\u7528\u6236\u60f3\u67e5\u770b\u7b2c3\u9801\u7684\u6578\u64da\uff0c\u5247\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT * FROM users\nLIMIT 10 OFFSET 20;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u7b2c21\u5230\u7b2c30\u689d\u8a18\u9304\u3002<\/p>\n<h2 id=\"2-%e4%bd%bf%e7%94%a8row_number%e5%87%bd%e6%95%b8-oYsBBUnWhx\">2. \u4f7f\u7528ROW_NUMBER()\u51fd\u6578<\/h2>\n<p>\u5728SQL Server\u548cOracle\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528ROW_NUMBER()\u51fd\u6578\u4f86\u5be6\u73fe\u5206\u9801\u3002\u9019\u500b\u51fd\u6578\u70ba\u67e5\u8a62\u7d50\u679c\u4e2d\u7684\u6bcf\u4e00\u884c\u5206\u914d\u4e00\u500b\u552f\u4e00\u7684\u5e8f\u865f\uff0c\u7136\u5f8c\u53ef\u4ee5\u6839\u64da\u9019\u500b\u5e8f\u865f\u9032\u884c\u7be9\u9078\u3002<\/p>\n<pre><code>WITH CTE AS (\n    SELECT *, ROW_NUMBER() OVER (ORDER BY id) AS row_num\n    FROM \u8868\u540d\n)\nSELECT *\nFROM CTE\nWHERE row_num BETWEEN \u958b\u59cb\u884c\u865f AND \u7d50\u675f\u884c\u865f;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u8981\u67e5\u8a62\u7b2c3\u9801\u7684\u6578\u64da\uff0c\u6bcf\u9801\u986f\u793a10\u689d\u8a18\u9304\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>WITH CTE AS (\n    SELECT *, ROW_NUMBER() OVER (ORDER BY id) AS row_num\n    FROM users\n)\nSELECT *\nFROM CTE\nWHERE row_num BETWEEN 21 AND 30;<\/code><\/pre>\n<h2 id=\"3-%e4%bd%bf%e7%94%a8offset-fetch%e5%ad%90%e5%8f%a5-oYsBBUnWhx\">3. \u4f7f\u7528OFFSET FETCH\u5b50\u53e5<\/h2>\n<p>\u5728SQL Server 2012\u53ca\u4ee5\u5f8c\u7684\u7248\u672c\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528OFFSET FETCH\u5b50\u53e5\u4f86\u5be6\u73fe\u5206\u9801\u3002\u9019\u7a2e\u65b9\u6cd5\u8207LIMIT\u548cOFFSET\u985e\u4f3c\uff0c\u4f46\u8a9e\u6cd5\u66f4\u70ba\u76f4\u89c0\u3002<\/p>\n<pre><code>SELECT * FROM \u8868\u540d\nORDER BY \u6392\u5e8f\u5217\nOFFSET \u7576\u524d\u9801\u6578 * \u6bcf\u9801\u986f\u793a\u7684\u8a18\u9304\u6578 ROWS\nFETCH NEXT \u6bcf\u9801\u986f\u793a\u7684\u8a18\u9304\u6578 ROWS ONLY;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u67e5\u8a62\u7b2c3\u9801\u7684\u6578\u64da\uff0c\u6bcf\u9801\u986f\u793a10\u689d\u8a18\u9304\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT * FROM users\nORDER BY id\nOFFSET 20 ROWS\nFETCH NEXT 10 ROWS ONLY;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-oYsBBUnWhx\">\u7e3d\u7d50<\/h2>\n<p>\u672c\u6587\u4ecb\u7d39\u4e86\u4e09\u7a2e\u5e38\u898b\u7684SQL\u5206\u9801\u8a9e\u53e5\uff1a\u4f7f\u7528LIMIT\u548cOFFSET\u3001ROW_NUMBER()\u51fd\u6578\u4ee5\u53caOFFSET FETCH\u5b50\u53e5\u3002\u9019\u4e9b\u65b9\u6cd5\u5404\u6709\u512a\u7f3a\u9ede\uff0c\u9078\u64c7\u5408\u9069\u7684\u5206\u9801\u65b9\u5f0f\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u67e5\u8a62\u7684\u6548\u7387\u548c\u7528\u6236\u9ad4\u9a57\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u548c\u914d\u7f6e\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6027\u80fd\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u4e09\u7a2e\u5e38\u7528\u7684SQL\u5206\u9801\u8a9e\u53e5\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\uff0c\u8b93\u4f60\u7684\u8cc7\u6599\u5eab\u64cd\u4f5c\u66f4\u6d41\u66a2\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-180138","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180138","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=180138"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180138\/revisions"}],"predecessor-version":[{"id":180139,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180138\/revisions\/180139"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}