{"id":197686,"date":"2024-11-14T09:52:29","date_gmt":"2024-11-14T01:52:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/197686\/"},"modified":"2024-11-14T09:52:30","modified_gmt":"2024-11-14T01:52:30","slug":"%e5%88%a9%e7%94%a8select%e8%aa%9e%e5%8f%a5%e7%89%b9%e6%80%a7%e5%af%a6%e7%8f%bemysql%e6%9f%a5%e8%a9%a2%e5%88%86%e9%a0%81","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/197686\/","title":{"rendered":"\u5229\u7528select\u8a9e\u53e5\u7279\u6027\u5be6\u73feMySQL\u67e5\u8a62\u5206\u9801"},"content":{"rendered":"<h1 id=\"%e5%88%a9%e7%94%a8select%e8%aa%9e%e5%8f%a5%e7%89%b9%e6%80%a7%e5%af%a6%e7%8f%bemysql%e6%9f%a5%e8%a9%a2%e5%88%86%e9%a0%81-hxiDfEKohx\">\u5229\u7528select\u8a9e\u53e5\u7279\u6027\u5be6\u73feMySQL\u67e5\u8a62\u5206\u9801<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u7db2\u9801\u61c9\u7528\u4e2d\uff0c\u6578\u64da\u7684\u5c55\u793a\u5f80\u5f80\u9700\u8981\u5206\u9801\u8655\u7406\uff0c\u4ee5\u63d0\u9ad8\u7528\u6236\u9ad4\u9a57\u548c\u7cfb\u7d71\u6027\u80fd\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u5be6\u73fe\u67e5\u8a62\u5206\u9801\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u5229\u7528MySQL\u7684select\u8a9e\u53e5\u7279\u6027\u4f86\u5be6\u73fe\u67e5\u8a62\u5206\u9801\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%9f%a5%e8%a9%a2%e5%88%86%e9%a0%81%ef%bc%9f-hxiDfEKohx\">\u4ec0\u9ebc\u662f\u67e5\u8a62\u5206\u9801\uff1f<\/h2>\n<p>\u67e5\u8a62\u5206\u9801\u662f\u6307\u5c07\u67e5\u8a62\u7d50\u679c\u5206\u6210\u591a\u500b\u9801\u9762\u986f\u793a\uff0c\u901a\u5e38\u7528\u65bc\u986f\u793a\u5927\u91cf\u6578\u64da\u6642\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u4e00\u6b21\u6027\u52a0\u8f09\u904e\u591a\u6578\u64da\uff0c\u5f9e\u800c\u63d0\u9ad8\u52a0\u8f09\u901f\u5ea6\u548c\u7528\u6236\u7684\u700f\u89bd\u9ad4\u9a57\u3002\u5206\u9801\u901a\u5e38\u6d89\u53ca\u5230\u5169\u500b\u4e3b\u8981\u53c3\u6578\uff1a\u7576\u524d\u9801\u78bc\u548c\u6bcf\u9801\u986f\u793a\u7684\u8a18\u9304\u6578\u3002<\/p>\n<h2 id=\"mysql%e4%b8%ad%e7%9a%84limit%e5%92%8coffset-hxiDfEKohx\">MySQL\u4e2d\u7684LIMIT\u548cOFFSET<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u5be6\u73fe\u67e5\u8a62\u5206\u9801\u7684\u6700\u5e38\u7528\u65b9\u6cd5\u662f\u4f7f\u7528<strong id=\"limit-hxiDfEKohx\">LIMIT<\/strong>\u548c<strong id=\"offset-hxiDfEKohx\">OFFSET<\/strong>\u5b50\u53e5\u3002\u9019\u5169\u500b\u5b50\u53e5\u53ef\u4ee5\u8207select\u8a9e\u53e5\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u9650\u5236\u67e5\u8a62\u7d50\u679c\u7684\u6578\u91cf\u548c\u8d77\u59cb\u4f4d\u7f6e\u3002<\/p>\n<h3 id=\"limit-hxiDfEKohx\">LIMIT<\/h3>\n<p><strong id=\"limit-hxiDfEKohx\">LIMIT<\/strong>\u5b50\u53e5\u7528\u65bc\u6307\u5b9a\u67e5\u8a62\u7d50\u679c\u4e2d\u8981\u8fd4\u56de\u7684\u8a18\u9304\u6578\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u67e5\u8a62\u5c07\u8fd4\u56de\u524d10\u689d\u8a18\u9304\uff1a<\/p>\n<pre><code>SELECT * FROM users LIMIT 10;<\/code><\/pre>\n<h3 id=\"offset-hxiDfEKohx\">OFFSET<\/h3>\n<p><strong id=\"offset-hxiDfEKohx\">OFFSET<\/strong>\u5b50\u53e5\u5247\u7528\u65bc\u6307\u5b9a\u5f9e\u54ea\u4e00\u689d\u8a18\u9304\u958b\u59cb\u8fd4\u56de\u7d50\u679c\u3002\u901a\u5e38\uff0cOFFSET\u7684\u503c\u662f\u57fa\u65bc\u6bcf\u9801\u986f\u793a\u7684\u8a18\u9304\u6578\u548c\u7576\u524d\u9801\u78bc\u8a08\u7b97\u5f97\u51fa\u7684\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6bcf\u9801\u986f\u793a10\u689d\u8a18\u9304\uff0c\u4e26\u4e14\u6211\u5011\u60f3\u8981\u7372\u53d6\u7b2c\u4e8c\u9801\u7684\u6578\u64da\uff0c\u5247\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT * FROM users LIMIT 10 OFFSET 10;<\/code><\/pre>\n<p>\u9019\u88e1\uff0cLIMIT 10\u8868\u793a\u8fd4\u56de10\u689d\u8a18\u9304\uff0c\u800cOFFSET 10\u8868\u793a\u5f9e\u7b2c11\u689d\u8a18\u9304\u958b\u59cb\u3002<\/p>\n<h2 id=\"%e8%a8%88%e7%ae%97%e7%95%b6%e5%89%8d%e9%a0%81%e7%a2%bc%e5%92%8coffset-hxiDfEKohx\">\u8a08\u7b97\u7576\u524d\u9801\u78bc\u548cOFFSET<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u7576\u7528\u6236\u9ede\u64ca\u4e0d\u540c\u7684\u9801\u78bc\u6642\uff0c\u6211\u5011\u9700\u8981\u8a08\u7b97\u51fa\u76f8\u61c9\u7684OFFSET\u503c\u3002\u5047\u8a2d\u6bcf\u9801\u986f\u793a10\u689d\u8a18\u9304\uff0c\u7576\u524d\u9801\u78bc\u70ba<\/p>\n<p>page<\/p>\n<p>\uff0c\u5247OFFSET\u7684\u8a08\u7b97\u516c\u5f0f\u70ba\uff1a<\/p>\n<pre><code>OFFSET = (page - 1) * \u6bcf\u9801\u986f\u793a\u7684\u8a18\u9304\u6578;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u7576\u524d\u9801\u78bc\u70ba3\uff0c\u5247OFFSET\u70ba\uff1a<\/p>\n<pre><code>OFFSET = (3 - 1) * 10 = 20;<\/code><\/pre>\n<h2 id=\"%e5%ae%8c%e6%95%b4%e7%9a%84%e6%9f%a5%e8%a9%a2%e7%a4%ba%e4%be%8b-hxiDfEKohx\">\u5b8c\u6574\u7684\u67e5\u8a62\u793a\u4f8b<\/h2>\n<p>\u7d9c\u5408\u4ee5\u4e0a\u5167\u5bb9\uff0c\u4ee5\u4e0b\u662f\u4e00\u500b\u5b8c\u6574\u7684\u67e5\u8a62\u793a\u4f8b\uff0c\u5047\u8a2d\u6211\u5011\u8981\u67e5\u8a62\u7528\u6236\u8868\u4e2d\u7684\u6578\u64da\uff0c\u4e26\u5be6\u73fe\u5206\u9801\u529f\u80fd\uff1a<\/p>\n<pre><code>\nSET @page := 3; -- \u7576\u524d\u9801\u78bc\nSET @pageSize := 10; -- \u6bcf\u9801\u986f\u793a\u7684\u8a18\u9304\u6578\nSET @offset := (@page - 1) * @pageSize;\n\nSELECT * FROM users LIMIT @pageSize OFFSET @offset;\n<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-hxiDfEKohx\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528LIMIT\u548cOFFSET\u9032\u884c\u5206\u9801\u67e5\u8a62\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u7576\u6578\u64da\u91cf\u975e\u5e38\u5927\u6642\uff0c\u4f7f\u7528OFFSET\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u554f\u984c\uff0c\u56e0\u70ba\u6578\u64da\u5eab\u9700\u8981\u8df3\u904e\u524d\u9762\u7684\u8a18\u9304\u3002<\/li>\n<li>\u70ba\u4e86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u7d22\u5f15\uff0c\u7279\u5225\u662f\u5728\u6d89\u53ca\u5230\u6392\u5e8f\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<li>\u5728\u5be6\u73fe\u5206\u9801\u6642\uff0c\u61c9\u8a72\u8003\u616e\u5230\u6578\u64da\u7684\u8b8a\u5316\uff0c\u7279\u5225\u662f\u5728\u591a\u7528\u6236\u74b0\u5883\u4e2d\uff0c\u6578\u64da\u53ef\u80fd\u6703\u96a8\u6642\u66f4\u65b0\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-hxiDfEKohx\">\u7e3d\u7d50<\/h2>\n<p>\u5229\u7528MySQL\u7684select\u8a9e\u53e5\u7279\u6027\uff0c\u901a\u904eLIMIT\u548cOFFSET\u53ef\u4ee5\u8f15\u9b06\u5be6\u73fe\u67e5\u8a62\u5206\u9801\u529f\u80fd\u3002\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u7528\u6236\u7684\u700f\u89bd\u9ad4\u9a57\uff0c\u9084\u80fd\u6709\u6548\u7ba1\u7406\u7cfb\u7d71\u8cc7\u6e90\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u61c9\u7528\u4f86\u8aaa\uff0c\u5408\u7406\u7684\u5206\u9801\u8a2d\u8a08\u662f\u81f3\u95dc\u91cd\u8981\u7684\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\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u548c\u64f4\u5c55\u60a8\u7684\u696d\u52d9\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5229\u7528SELECT\u8a9e\u53e5\u7684\u7279\u6027\u5728MySQL\u4e2d\u5be6\u73fe\u67e5\u8a62\u5206\u9801\uff0c\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u6548\u7387\u8207\u7528\u6236\u9ad4\u9a57\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-197686","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/197686","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=197686"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/197686\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=197686"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=197686"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=197686"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}