{"id":62279,"date":"2024-10-13T17:41:15","date_gmt":"2024-10-13T09:41:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/62279\/"},"modified":"2024-10-13T17:41:15","modified_gmt":"2024-10-13T09:41:15","slug":"limit%e5%92%8coffset%e5%88%86%e9%a0%81%e6%80%a7%e8%83%bd%e5%b7%ae%ef%bc%81%e4%bb%8a%e5%a4%a9%e4%be%86%e4%bb%8b%e7%b4%b9%e5%a6%82%e4%bd%95%e9%ab%98%e6%80%a7%e8%83%bd%e5%88%86%e9%a0%81","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/62279\/","title":{"rendered":"LIMIT\u548cOFFSET\u5206\u9801\u6027\u80fd\u5dee\uff01\u4eca\u5929\u4f86\u4ecb\u7d39\u5982\u4f55\u9ad8\u6027\u80fd\u5206\u9801"},"content":{"rendered":"<h1 id=\"limit%e5%92%8coffset%e5%88%86%e9%a0%81%e6%80%a7%e8%83%bd%e5%b7%ae%ef%bc%81%e4%bb%8a%e5%a4%a9%e4%be%86%e4%bb%8b%e7%b4%b9%e5%a6%82%e4%bd%95%e9%ab%98%e6%80%a7%e8%83%bd%e5%88%86%e9%a0%81-MCgJdAUYWA\">LIMIT\u548cOFFSET\u5206\u9801\u6027\u80fd\u5dee\uff01\u4eca\u5929\u4f86\u4ecb\u7d39\u5982\u4f55\u9ad8\u6027\u80fd\u5206\u9801<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u7db2\u9801\u61c9\u7528\u4e2d\uff0c\u5206\u9801\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\uff0c\u5c24\u5176\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002\u8a31\u591a\u958b\u767c\u8005\u7fd2\u6163\u4f7f\u7528 SQL \u7684 <code>LIMIT<\/code> \u548c <code>OFFSET<\/code> \u4f86\u5be6\u73fe\u5206\u9801\u529f\u80fd\u3002\u7136\u800c\uff0c\u9019\u7a2e\u65b9\u6cd5\u5728\u6578\u64da\u91cf\u589e\u5927\u6642\uff0c\u6027\u80fd\u6703\u986f\u8457\u4e0b\u964d\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u9019\u4e00\u554f\u984c\u7684\u6839\u6e90\uff0c\u4e26\u4ecb\u7d39\u4e00\u4e9b\u9ad8\u6027\u80fd\u7684\u5206\u9801\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"limit%e5%92%8coffset%e7%9a%84%e6%80%a7%e8%83%bd%e5%95%8f%e9%a1%8c-MCgJdAUYWA\">LIMIT\u548cOFFSET\u7684\u6027\u80fd\u554f\u984c<\/h2>\n<p>\u4f7f\u7528 <code>LIMIT<\/code> \u548c <code>OFFSET<\/code> \u9032\u884c\u5206\u9801\u6642\uff0cSQL \u67e5\u8a62\u7684\u7d50\u69cb\u901a\u5e38\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT * FROM table_name ORDER BY id LIMIT 10 OFFSET 20;<\/code><\/pre>\n<p>\u9019\u6bb5\u67e5\u8a62\u7684\u610f\u601d\u662f\u5f9e\u7b2c 21 \u689d\u8a18\u9304\u958b\u59cb\uff0c\u9078\u53d6 10 \u689d\u8a18\u9304\u3002\u96d6\u7136\u9019\u7a2e\u65b9\u6cd5\u7c21\u55ae\u6613\u7528\uff0c\u4f46\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u52a0\uff0c\u6027\u80fd\u6703\u53d7\u5230\u5f71\u97ff\u3002\u539f\u56e0\u5728\u65bc\uff0c\u6578\u64da\u5eab\u5728\u57f7\u884c\u67e5\u8a62\u6642\u9700\u8981\u8df3\u904e\u524d\u9762\u7684\u8a18\u9304\uff0c\u9019\u6703\u5c0e\u81f4\u67e5\u8a62\u6642\u9593\u96a8\u8457 <code>OFFSET<\/code> \u7684\u589e\u5927\u800c\u589e\u52a0\u3002<\/p>\n<h2 id=\"%e6%80%a7%e8%83%bd%e4%b8%8b%e9%99%8d%e7%9a%84%e5%8e%9f%e5%9b%a0-MCgJdAUYWA\">\u6027\u80fd\u4e0b\u964d\u7684\u539f\u56e0<\/h2>\n<ul>\n<li><strong>\u5168\u8868\u6383\u63cf\uff1a<\/strong>\u7576 <code>OFFSET<\/code> \u7684\u503c\u5f88\u5927\u6642\uff0c\u6578\u64da\u5eab\u9700\u8981\u6383\u63cf\u5927\u91cf\u7684\u8a18\u9304\uff0c\u9019\u6703\u6d88\u8017\u5927\u91cf\u7684\u8cc7\u6e90\u3002<\/li>\n<li><strong>\u7d22\u5f15\u7684\u4f7f\u7528\uff1a<\/strong>\u5373\u4f7f\u6709\u7d22\u5f15\uff0c\u6578\u64da\u5eab\u4ecd\u7136\u9700\u8981\u904d\u6b77\u7d22\u5f15\u4f86\u627e\u5230\u6b63\u78ba\u7684\u8d77\u59cb\u4f4d\u7f6e\uff0c\u9019\u6703\u5f71\u97ff\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<li><strong>\u8a18\u61b6\u9ad4\u6d88\u8017\uff1a<\/strong>\u96a8\u8457 <code>OFFSET<\/code> \u7684\u589e\u5927\uff0c\u67e5\u8a62\u6240\u9700\u7684\u8a18\u61b6\u9ad4\u4e5f\u6703\u589e\u52a0\uff0c\u9019\u53ef\u80fd\u5c0e\u81f4\u6027\u80fd\u74f6\u9838\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%ab%98%e6%80%a7%e8%83%bd%e5%88%86%e9%a0%81%e7%9a%84%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-MCgJdAUYWA\">\u9ad8\u6027\u80fd\u5206\u9801\u7684\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u70ba\u4e86\u89e3\u6c7a <code>LIMIT<\/code> \u548c <code>OFFSET<\/code> \u7684\u6027\u80fd\u554f\u984c\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u7a2e\u9ad8\u6027\u80fd\u7684\u5206\u9801\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e6%b8%b8%e6%a8%99%e5%88%86%e9%a0%81-MCgJdAUYWA\">1. \u4f7f\u7528\u6e38\u6a19\u5206\u9801<\/h3>\n<p>\u6e38\u6a19\u5206\u9801\u662f\u4e00\u7a2e\u57fa\u65bc\u8a18\u9304\u7684\u5206\u9801\u65b9\u6cd5\uff0c\u901a\u5e38\u4f7f\u7528\u4e00\u500b\u552f\u4e00\u7684\u6a19\u8b58\u7b26\uff08\u5982 ID\uff09\u4f86\u8ffd\u8e64\u7576\u524d\u7684\u4f4d\u7f6e\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u4f7f\u7528 <code>OFFSET<\/code>\uff0c\u5f9e\u800c\u63d0\u9ad8\u6027\u80fd\u3002\u67e5\u8a62\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT * FROM table_name WHERE id &gt; last_seen_id ORDER BY id LIMIT 10;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c<code>last_seen_id<\/code> \u662f\u4e0a\u4e00\u6b21\u67e5\u8a62\u7684\u6700\u5f8c\u4e00\u689d\u8a18\u9304\u7684 ID\u3002\u9019\u6a23\u7684\u67e5\u8a62\u4e0d\u9700\u8981\u8df3\u904e\u8a18\u9304\uff0c\u6027\u80fd\u66f4\u4f73\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e7%af%84%e5%9c%8d%e6%9f%a5%e8%a9%a2-MCgJdAUYWA\">2. \u4f7f\u7528\u7bc4\u570d\u67e5\u8a62<\/h3>\n<p>\u7bc4\u570d\u67e5\u8a62\u662f\u53e6\u4e00\u7a2e\u6709\u6548\u7684\u5206\u9801\u65b9\u6cd5\uff0c\u7279\u5225\u9069\u5408\u65bc\u6709\u5e8f\u6578\u64da\u3002\u53ef\u4ee5\u6839\u64da\u67d0\u500b\u7bc4\u570d\u4f86\u67e5\u8a62\u6578\u64da\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM table_name WHERE created_at BETWEEN start_date AND end_date ORDER BY created_at LIMIT 10;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u53ef\u4ee5\u6709\u6548\u5730\u9650\u5236\u8fd4\u56de\u7684\u8a18\u9304\u6578\u91cf\uff0c\u4e26\u4e14\u4e0d\u9700\u8981\u4f7f\u7528 <code>OFFSET<\/code>\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e7%89%a9%e5%8c%96%e8%a6%96%e5%9c%96-MCgJdAUYWA\">3. \u4f7f\u7528\u7269\u5316\u8996\u5716<\/h3>\n<p>\u7269\u5316\u8996\u5716\u53ef\u4ee5\u9810\u5148\u8a08\u7b97\u548c\u5b58\u5132\u67e5\u8a62\u7d50\u679c\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u96d6\u7136\u9019\u9700\u8981\u984d\u5916\u7684\u5b58\u5132\u7a7a\u9593\uff0c\u4f46\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u67e5\u8a62\u901f\u5ea6\u6703\u986f\u8457\u63d0\u9ad8\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-MCgJdAUYWA\">\u7d50\u8ad6<\/h2>\n<p>\u96d6\u7136 <code>LIMIT<\/code> \u548c <code>OFFSET<\/code> \u662f\u5be6\u73fe\u5206\u9801\u7684\u5e38\u898b\u65b9\u6cd5\uff0c\u4f46\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u5176\u6027\u80fd\u6703\u53d7\u5230\u9650\u5236\u3002\u901a\u904e\u4f7f\u7528\u6e38\u6a19\u5206\u9801\u3001\u7bc4\u570d\u67e5\u8a62\u548c\u7269\u5316\u8996\u5716\u7b49\u9ad8\u6027\u80fd\u5206\u9801\u6280\u8853\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u6e1b\u5c11\u8cc7\u6e90\u6d88\u8017\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u5206\u9801\u7b56\u7565\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c\u5176\u4ed6\u4f3a\u670d\u5668\u89e3\u6c7a\u65b9\u6848\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22LIMIT\u548cOFFSET\u5728\u5206\u9801\u4e2d\u7684\u6027\u80fd\u554f\u984c\uff0c\u4e86\u89e3\u9ad8\u6548\u5206\u9801\u6280\u8853\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u901f\u5ea6\u8207\u6548\u7387\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-62279","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62279","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=62279"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62279\/revisions"}],"predecessor-version":[{"id":62280,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62279\/revisions\/62280"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=62279"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=62279"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=62279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}