{"id":60919,"date":"2024-10-13T06:55:13","date_gmt":"2024-10-12T22:55:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60919\/"},"modified":"2024-10-13T06:55:13","modified_gmt":"2024-10-12T22:55:13","slug":"db2%e9%80%9a%e7%94%a8%e7%bf%bb%e9%a0%81%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60919\/","title":{"rendered":"DB2\u901a\u7528\u7ffb\u9801\u5b58\u5132\u904e\u7a0b"},"content":{"rendered":"<h1 id=\"db2%e9%80%9a%e7%94%a8%e7%bf%bb%e9%a0%81%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b-YDWfbimUJY\">DB2\u901a\u7528\u7ffb\u9801\u5b58\u5132\u904e\u7a0b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7ffb\u9801\uff08Pagination\uff09\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\uff0c\u5c24\u5176\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002DB2\u4f5c\u70baIBM\u7684\u4e00\u6b3e\u5f37\u5927\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u5be6\u73fe\u7ffb\u9801\u529f\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728DB2\u4e2d\u5275\u5efa\u901a\u7528\u7ffb\u9801\u5b58\u5132\u904e\u7a0b\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"%e7%bf%bb%e9%a0%81%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-YDWfbimUJY\">\u7ffb\u9801\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u7ffb\u9801\u662f\u6307\u5c07\u67e5\u8a62\u7d50\u679c\u5206\u6210\u591a\u500b\u9801\u9762\uff0c\u4ee5\u4fbf\u7528\u6236\u53ef\u4ee5\u9010\u6b65\u67e5\u770b\u6578\u64da\u3002\u9019\u5728\u986f\u793a\u5927\u91cf\u6578\u64da\u6642\u7279\u5225\u6709\u7528\uff0c\u56e0\u70ba\u5b83\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u4e26\u6539\u5584\u7528\u6236\u9ad4\u9a57\u3002\u7ffb\u9801\u901a\u5e38\u6d89\u53ca\u5230\u5169\u500b\u4e3b\u8981\u53c3\u6578\uff1a\u9801\u78bc\uff08Page Number\uff09\u548c\u6bcf\u9801\u986f\u793a\u7684\u8a18\u9304\u6578\uff08Page Size\uff09\u3002<\/p>\n<h2 id=\"db2%e4%b8%ad%e7%9a%84%e7%bf%bb%e9%a0%81%e5%af%a6%e7%8f%be-YDWfbimUJY\">DB2\u4e2d\u7684\u7ffb\u9801\u5be6\u73fe<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u53ef\u4ee5\u901a\u904e\u4f7f\u7528\u6e38\u6a19\uff08Cursor\uff09\u548c\u5b58\u5132\u904e\u7a0b\u4f86\u5be6\u73fe\u7ffb\u9801\u529f\u80fd\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u4e00\u500b\u901a\u7528\u7ffb\u9801\u5b58\u5132\u904e\u7a0b\u7684\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e5%89%b5%e5%bb%ba%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b-YDWfbimUJY\">1. \u5275\u5efa\u5b58\u5132\u904e\u7a0b<\/h3>\n<pre><code>\nCREATE OR REPLACE PROCEDURE GetPagedData (\n    IN pageNumber INT,\n    IN pageSize INT,\n    OUT totalRecords INT\n)\nLANGUAGE SQL\nBEGIN\n    DECLARE offsetValue INT;\n    \n    -- \u8a08\u7b97\u504f\u79fb\u91cf\n    SET offsetValue = (pageNumber - 1) * pageSize;\n\n    -- \u7372\u53d6\u7e3d\u8a18\u9304\u6578\n    SELECT COUNT(*) INTO totalRecords FROM YourTable;\n\n    -- \u8fd4\u56de\u7ffb\u9801\u6578\u64da\n    SELECT * FROM YourTable\n    ORDER BY YourColumn\n    OFFSET offsetValue ROWS\n    FETCH NEXT pageSize ROWS ONLY;\nEND;\n<\/code><\/pre>\n<h3 id=\"2-%e8%aa%aa%e6%98%8e%e4%bb%a3%e7%a2%bc-YDWfbimUJY\">2. \u8aaa\u660e\u4ee3\u78bc<\/h3>\n<ul>\n<li><strong>IN pageNumber INT<\/strong>\uff1a\u7528\u6236\u6307\u5b9a\u7684\u9801\u78bc\u3002<\/li>\n<li><strong>IN pageSize INT<\/strong>\uff1a\u6bcf\u9801\u986f\u793a\u7684\u8a18\u9304\u6578\u3002<\/li>\n<li><strong>OUT totalRecords INT<\/strong>\uff1a\u8fd4\u56de\u7684\u7e3d\u8a18\u9304\u6578\u3002<\/li>\n<li><strong>SET offsetValue<\/strong>\uff1a\u8a08\u7b97\u7576\u524d\u9801\u7684\u504f\u79fb\u91cf\u3002<\/li>\n<li><strong>SELECT COUNT(*)<\/strong>\uff1a\u67e5\u8a62\u7e3d\u8a18\u9304\u6578\u3002<\/li>\n<li><strong>SELECT * FROM YourTable<\/strong>\uff1a\u6839\u64da\u504f\u79fb\u91cf\u548c\u6bcf\u9801\u5927\u5c0f\u8fd4\u56de\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"3-%e4%bd%bf%e7%94%a8%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b-YDWfbimUJY\">3. \u4f7f\u7528\u5b58\u5132\u904e\u7a0b<\/h2>\n<p>\u4e00\u65e6\u5275\u5efa\u4e86\u5b58\u5132\u904e\u7a0b\uff0c\u5c31\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u65b9\u5f0f\u8abf\u7528\u5b83\uff1a<\/p>\n<pre><code>\nCALL GetPagedData(1, 10, totalRecords);\n<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u7b2c\u4e00\u9801\u768410\u689d\u8a18\u9304\uff0c\u4e26\u5c07\u7e3d\u8a18\u9304\u6578\u5b58\u5132\u5728\u8b8a\u91cftotalRecords\u4e2d\u3002<\/p>\n<h2 id=\"%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-YDWfbimUJY\">\u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u5728\u5be6\u73fe\u7ffb\u9801\u6642\uff0c\u6027\u80fd\u662f\u4e00\u500b\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002\u4f7f\u7528OFFSET\u548cFETCH\u8a9e\u53e5\u53ef\u4ee5\u7c21\u5316\u67e5\u8a62\uff0c\u4f46\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u70ba\u4e86\u63d0\u9ad8\u6027\u80fd\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u5c0d\u67e5\u8a62\u9032\u884c\u7d22\u5f15\uff0c\u4ee5\u52a0\u5feb\u6578\u64da\u6aa2\u7d22\u901f\u5ea6\u3002<\/li>\n<li>\u9650\u5236\u8fd4\u56de\u7684\u5217\u6578\uff0c\u50c5\u9078\u64c7\u5fc5\u8981\u7684\u5217\u3002<\/li>\n<li>\u8003\u616e\u4f7f\u7528\u7269\u5316\u8996\u5716\u4f86\u9810\u8a08\u7b97\u548c\u5b58\u5132\u7d50\u679c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-YDWfbimUJY\">\u7d50\u8ad6<\/h2>\n<p>DB2\u7684\u901a\u7528\u7ffb\u9801\u5b58\u5132\u904e\u7a0b\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u6709\u6548\u5730\u7ba1\u7406\u548c\u986f\u793a\u5927\u91cf\u6578\u64da\u3002\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u512a\u5316\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u7528\u6236\u9ad4\u9a57\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u61c9\u7528\uff0c\u9019\u7a2e\u65b9\u6cd5\u7121\u7591\u662f\u503c\u5f97\u8003\u616e\u7684\u9078\u64c7\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<code><a href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u548c<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DB2\u901a\u7528\u7ffb\u9801\u5b58\u5132\u904e\u7a0b\uff0c\u7c21\u5316\u6578\u64da\u67e5\u8a62\u8207\u7ba1\u7406\uff0c\u63d0\u5347\u6027\u80fd\u8207\u6548\u7387\uff0c\u52a9\u529b\u958b\u767c\u8005\u5feb\u901f\u5be6\u73fe\u7ffb\u9801\u529f\u80fd\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-60919","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60919","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=60919"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60919\/revisions"}],"predecessor-version":[{"id":60920,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60919\/revisions\/60920"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60919"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60919"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60919"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}