{"id":60983,"date":"2024-10-13T07:27:20","date_gmt":"2024-10-12T23:27:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60983\/"},"modified":"2024-10-13T07:27:20","modified_gmt":"2024-10-12T23:27:20","slug":"db2%e4%b8%ad%e7%bf%bb%e9%a0%81%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b%e5%af%a6%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60983\/","title":{"rendered":"DB2\u4e2d\u7ffb\u9801\u5b58\u5132\u904e\u7a0b\u5be6\u4f8b"},"content":{"rendered":"<h1 id=\"db2%e4%b8%ad%e7%bf%bb%e9%a0%81%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b%e5%af%a6%e4%be%8b-sDFwJYlkHw\">DB2\u4e2d\u7ffb\u9801\u5b58\u5132\u904e\u7a0b\u5be6\u4f8b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u7ffb\u9801\uff08Pagination\uff09\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002DB2\u4f5c\u70baIBM\u7684\u4e00\u6b3e\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u5be6\u73fe\u7ffb\u9801\u529f\u80fd\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728DB2\u4e2d\u4f7f\u7528\u5b58\u5132\u904e\u7a0b\u4f86\u5be6\u73fe\u7ffb\u9801\uff0c\u4e26\u63d0\u4f9b\u5177\u9ad4\u7684\u5be6\u4f8b\u548c\u4ee3\u78bc\u793a\u7bc4\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-sDFwJYlkHw\">\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\u9801\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\u7528\u6236\u9ad4\u9a57\u4e26\u6e1b\u5c11\u4e00\u6b21\u6027\u52a0\u8f09\u7684\u6578\u64da\u91cf\u3002\u7ffb\u9801\u901a\u5e38\u9700\u8981\u5169\u500b\u53c3\u6578\uff1a\u7576\u524d\u9801\u78bc\u548c\u6bcf\u9801\u986f\u793a\u7684\u8a18\u9304\u6578\u3002<\/p>\n<h2 id=\"db2%e4%b8%ad%e7%9a%84%e7%bf%bb%e9%a0%81%e5%af%a6%e7%8f%be-sDFwJYlkHw\">DB2\u4e2d\u7684\u7ffb\u9801\u5be6\u73fe<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u53ef\u4ee5\u901a\u904e\u4f7f\u7528\u5b58\u5132\u904e\u7a0b\u4f86\u5be6\u73fe\u7ffb\u9801\u529f\u80fd\u3002\u5b58\u5132\u904e\u7a0b\u662f\u4e00\u7d44\u9810\u7de8\u8b6f\u7684SQL\u8a9e\u53e5\uff0c\u53ef\u4ee5\u5728\u6578\u64da\u5eab\u4e2d\u57f7\u884c\u3002\u4ee5\u4e0b\u662f\u5be6\u73fe\u7ffb\u9801\u7684\u57fa\u672c\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-sDFwJYlkHw\">1. \u5275\u5efa\u5b58\u5132\u904e\u7a0b<\/h3>\n<pre><code>\nCREATE OR REPLACE PROCEDURE GetPagedData (\n    IN pageNum 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 = (pageNum - 1) * pageSize;\n\n    -- \u7372\u53d6\u7e3d\u8a18\u9304\u6578\n    SELECT COUNT(*) INTO totalRecords FROM YourTable;\n\n    -- \u7372\u53d6\u7576\u524d\u9801\u9762\u7684\u6578\u64da\n    SELECT * FROM YourTable\n    ORDER BY YourColumn\n    OFFSET offsetValue ROWS FETCH NEXT pageSize ROWS ONLY;\nEND;\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba`GetPagedData`\u7684\u5b58\u5132\u904e\u7a0b\uff0c\u63a5\u53d7\u7576\u524d\u9801\u78bc\u548c\u6bcf\u9801\u986f\u793a\u7684\u8a18\u9304\u6578\u4f5c\u70ba\u8f38\u5165\u53c3\u6578\uff0c\u4e26\u8fd4\u56de\u7e3d\u8a18\u9304\u6578\u3002\u4f7f\u7528`OFFSET`\u548c`FETCH NEXT`\u8a9e\u53e5\u4f86\u5be6\u73fe\u7ffb\u9801\u3002<\/p>\n<h3 id=\"2-%e8%aa%bf%e7%94%a8%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b-sDFwJYlkHw\">2. \u8abf\u7528\u5b58\u5132\u904e\u7a0b<\/h3>\n<p>\u5275\u5efa\u5b58\u5132\u904e\u7a0b\u5f8c\uff0c\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>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u8acb\u6c42\u7b2c1\u9801\u7684\u6578\u64da\uff0c\u6bcf\u9801\u986f\u793a10\u689d\u8a18\u9304\u3002`totalRecords`\u5c07\u8fd4\u56de\u8868\u4e2d\u7684\u7e3d\u8a18\u9304\u6578\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%e5%88%86%e6%9e%90-sDFwJYlkHw\">\u793a\u4f8b\u5206\u6790<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba`Employees`\u7684\u8868\uff0c\u5305\u542b\u54e1\u5de5\u7684\u8a73\u7d30\u4fe1\u606f\u3002\u6211\u5011\u5e0c\u671b\u6bcf\u9801\u986f\u793a5\u540d\u54e1\u5de5\u7684\u6578\u64da\uff0c\u4e26\u80fd\u5920\u7ffb\u9801\u67e5\u770b\u6240\u6709\u54e1\u5de5\u7684\u4fe1\u606f\u3002<\/p>\n<pre><code>\nCALL GetPagedData(2, 5, totalRecords);\n<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u7b2c2\u9801\u76845\u540d\u54e1\u5de5\u7684\u6578\u64da\uff0c\u4e26\u4e14`totalRecords`\u5c07\u544a\u8a34\u6211\u5011`Employees`\u8868\u4e2d\u7e3d\u5171\u6709\u591a\u5c11\u540d\u54e1\u5de5\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-sDFwJYlkHw\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u78ba\u4fdd\u5728\u4f7f\u7528`OFFSET`\u6642\uff0c`pageNum`\u548c`pageSize`\u7684\u503c\u662f\u6709\u6548\u7684\u3002<\/li>\n<li>\u5728\u5927\u6578\u64da\u96c6\u4e0a\u4f7f\u7528\u7ffb\u9801\u6642\uff0c\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\uff0c\u5efa\u8b70\u5c0d\u67e5\u8a62\u9032\u884c\u512a\u5316\u3002<\/li>\n<li>\u8003\u616e\u4f7f\u7528\u7d22\u5f15\u4f86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-sDFwJYlkHw\">\u7e3d\u7d50<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u901a\u904e\u5b58\u5132\u904e\u7a0b\u5be6\u73fe\u7ffb\u9801\u662f\u4e00\u7a2e\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u65b9\u5f0f\u3002\u672c\u6587\u4ecb\u7d39\u4e86\u5982\u4f55\u5275\u5efa\u548c\u8abf\u7528\u5b58\u5132\u904e\u7a0b\u4f86\u5be6\u73fe\u7ffb\u9801\u529f\u80fd\uff0c\u4e26\u63d0\u4f9b\u4e86\u5177\u9ad4\u7684\u4ee3\u78bc\u793a\u4f8b\u3002\u9019\u7a2e\u65b9\u6cd5\u4e0d\u50c5\u80fd\u5920\u63d0\u9ad8\u7528\u6236\u9ad4\u9a57\uff0c\u9084\u80fd\u6709\u6548\u7ba1\u7406\u5927\u91cf\u6578\u64da\u7684\u986f\u793a\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u6280\u8853\u89e3\u6c7a\u65b9\u6848\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\uff0c\u7279\u5225\u662f\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">VPS<\/a> \u670d\u52d9\uff0c\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DB2\u4e2d\u7ffb\u9801\u5b58\u5132\u904e\u7a0b\u7684\u5be6\u4f8b\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u7ba1\u7406\u6578\u64da\u5206\u9801\u548c\u67e5\u8a62\u6027\u80fd\u512a\u5316\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-60983","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60983","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=60983"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60983\/revisions"}],"predecessor-version":[{"id":60984,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60983\/revisions\/60984"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60983"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60983"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60983"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}