{"id":60647,"date":"2024-10-13T04:37:13","date_gmt":"2024-10-12T20:37:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60647\/"},"modified":"2024-10-13T04:37:13","modified_gmt":"2024-10-12T20:37:13","slug":"db2%e6%95%b8%e6%93%9a%e5%ba%abolap%e5%87%bd%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8%e8%a9%b3%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60647\/","title":{"rendered":"DB2\u6578\u64da\u5eabOLAP\u51fd\u6578\u7684\u4f7f\u7528\u8a73\u89e3"},"content":{"rendered":"<h1 id=\"db2%e6%95%b8%e6%93%9a%e5%ba%abolap%e5%87%bd%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8%e8%a9%b3%e8%a7%a3-NBfncPpEzA\">DB2\u6578\u64da\u5eabOLAP\u51fd\u6578\u7684\u4f7f\u7528\u8a73\u89e3<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5206\u6790\u5df2\u6210\u70ba\u4f01\u696d\u6c7a\u7b56\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\u3002IBM\u7684DB2\u6578\u64da\u5eab\u63d0\u4f9b\u4e86\u5f37\u5927\u7684OLAP\uff08\u5728\u7dda\u5206\u6790\u8655\u7406\uff09\u529f\u80fd\uff0c\u5e6b\u52a9\u7528\u6236\u9032\u884c\u9ad8\u6548\u7684\u6578\u64da\u5206\u6790\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eDB2\u6578\u64da\u5eab\u4e2d\u7684OLAP\u51fd\u6578\u53ca\u5176\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afolap%e5%87%bd%e6%95%b8%ef%bc%9f-NBfncPpEzA\">\u4ec0\u9ebc\u662fOLAP\u51fd\u6578\uff1f<\/h2>\n<p>OLAP\u51fd\u6578\u662f\u4e00\u7d44\u7528\u65bc\u5206\u6790\u591a\u7dad\u6578\u64da\u7684\u51fd\u6578\uff0c\u80fd\u5920\u5feb\u901f\u5730\u5c0d\u5927\u91cf\u6578\u64da\u9032\u884c\u805a\u5408\u548c\u8a08\u7b97\u3002\u9019\u4e9b\u51fd\u6578\u901a\u5e38\u7528\u65bc\u5831\u544a\u548c\u6578\u64da\u6316\u6398\uff0c\u5e6b\u52a9\u7528\u6236\u5f9e\u4e0d\u540c\u7684\u89d2\u5ea6\u5206\u6790\u6578\u64da\u3002DB2\u4e2d\u7684OLAP\u51fd\u6578\u5305\u62ec\u4f46\u4e0d\u9650\u65bc\uff1a<code>RANK()<\/code>\u3001<code>DENSE_RANK()<\/code>\u3001<code>ROW_NUMBER()<\/code>\u3001<code>SUM()<\/code>\u3001<code>AVG()<\/code>\u7b49\u3002<\/p>\n<h2 id=\"db2%e4%b8%ad%e7%9a%84olap%e5%87%bd%e6%95%b8%e7%a4%ba%e4%be%8b-NBfncPpEzA\">DB2\u4e2d\u7684OLAP\u51fd\u6578\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684OLAP\u51fd\u6578\u53ca\u5176\u7528\u6cd5\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"1-rank-%e5%87%bd%e6%95%b8-NBfncPpEzA\">1. RANK() \u51fd\u6578<\/h3>\n<p><code>RANK()<\/code>\u51fd\u6578\u7528\u65bc\u70ba\u6bcf\u4e00\u884c\u5206\u914d\u4e00\u500b\u6392\u540d\uff0c\u6839\u64da\u6307\u5b9a\u7684\u6392\u5e8f\u689d\u4ef6\u3002\u7576\u6709\u76f8\u540c\u7684\u503c\u6642\uff0c\u6703\u7d66\u4e88\u76f8\u540c\u7684\u6392\u540d\uff0c\u4e26\u8df3\u904e\u5f8c\u7e8c\u7684\u6392\u540d\u3002<\/p>\n<pre><code>\nSELECT \n    employee_id, \n    salary, \n    RANK() OVER (ORDER BY salary DESC) AS salary_rank\nFROM \n    employees;\n<\/code><\/pre>\n<h3 id=\"2-dense_rank-%e5%87%bd%e6%95%b8-NBfncPpEzA\">2. DENSE_RANK() \u51fd\u6578<\/h3>\n<p><code>DENSE_RANK()<\/code>\u51fd\u6578\u8207<code>RANK()<\/code>\u985e\u4f3c\uff0c\u4f46\u4e0d\u6703\u8df3\u904e\u6392\u540d\u3002\u9019\u610f\u5473\u8457\u5982\u679c\u6709\u76f8\u540c\u7684\u503c\uff0c\u5f8c\u7e8c\u7684\u6392\u540d\u6703\u7dca\u63a5\u8457\u524d\u9762\u7684\u6392\u540d\u3002<\/p>\n<pre><code>\nSELECT \n    employee_id, \n    salary, \n    DENSE_RANK() OVER (ORDER BY salary DESC) AS dense_salary_rank\nFROM \n    employees;\n<\/code><\/pre>\n<h3 id=\"3-row_number-%e5%87%bd%e6%95%b8-NBfncPpEzA\">3. ROW_NUMBER() \u51fd\u6578<\/h3>\n<p><code>ROW_NUMBER()<\/code>\u51fd\u6578\u70ba\u6bcf\u4e00\u884c\u5206\u914d\u4e00\u500b\u552f\u4e00\u7684\u5e8f\u865f\uff0c\u7121\u8ad6\u5176\u503c\u662f\u5426\u76f8\u540c\u3002<\/p>\n<pre><code>\nSELECT \n    employee_id, \n    salary, \n    ROW_NUMBER() OVER (ORDER BY salary DESC) AS row_num\nFROM \n    employees;\n<\/code><\/pre>\n<h3 id=\"4-%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b8-NBfncPpEzA\">4. \u805a\u5408\u51fd\u6578<\/h3>\n<p>\u9664\u4e86\u6392\u540d\u51fd\u6578\uff0cDB2\u9084\u652f\u6301\u591a\u7a2e\u805a\u5408\u51fd\u6578\uff0c\u4f8b\u5982<code>SUM()<\/code>\u548c<code>AVG()<\/code>\uff0c\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u8207OLAP\u529f\u80fd\u7d50\u5408\u4f7f\u7528\u3002<\/p>\n<pre><code>\nSELECT \n    department_id, \n    SUM(salary) AS total_salary, \n    AVG(salary) AS average_salary\nFROM \n    employees\nGROUP BY \n    department_id;\n<\/code><\/pre>\n<h2 id=\"olap%e5%87%bd%e6%95%b8%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-NBfncPpEzA\">OLAP\u51fd\u6578\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>OLAP\u51fd\u6578\u5728\u591a\u500b\u5834\u666f\u4e2d\u90fd\u80fd\u767c\u63ee\u91cd\u8981\u4f5c\u7528\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li><strong>\u696d\u52d9\u5831\u544a\uff1a<\/strong>\u901a\u904e\u4f7f\u7528OLAP\u51fd\u6578\uff0c\u4f01\u696d\u53ef\u4ee5\u751f\u6210\u8a73\u7d30\u7684\u696d\u52d9\u5831\u544a\uff0c\u5e6b\u52a9\u7ba1\u7406\u5c64\u505a\u51fa\u660e\u667a\u7684\u6c7a\u7b56\u3002<\/li>\n<li><strong>\u5e02\u5834\u5206\u6790\uff1a<\/strong>\u5206\u6790\u5e02\u5834\u8da8\u52e2\u548c\u6d88\u8cbb\u8005\u884c\u70ba\uff0c\u5f9e\u800c\u5236\u5b9a\u66f4\u6709\u6548\u7684\u71df\u92b7\u7b56\u7565\u3002<\/li>\n<li><strong>\u8ca1\u52d9\u5206\u6790\uff1a<\/strong>\u901a\u904e\u5c0d\u8ca1\u52d9\u6578\u64da\u7684\u6df1\u5165\u5206\u6790\uff0c\u4f01\u696d\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u6210\u672c\u548c\u9810\u7b97\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-NBfncPpEzA\">\u7d50\u8ad6<\/h2>\n<p>DB2\u6578\u64da\u5eab\u7684OLAP\u51fd\u6578\u70ba\u7528\u6236\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u6578\u64da\u5206\u6790\u80fd\u529b\uff0c\u80fd\u5920\u5e6b\u52a9\u4f01\u696d\u5f9e\u5927\u91cf\u6578\u64da\u4e2d\u63d0\u53d6\u6709\u50f9\u503c\u7684\u4fe1\u606f\u3002\u901a\u904e\u9748\u6d3b\u904b\u7528\u9019\u4e9b\u51fd\u6578\uff0c\u4f01\u696d\u53ef\u4ee5\u5728\u7af6\u722d\u6fc0\u70c8\u7684\u5e02\u5834\u4e2d\u4fdd\u6301\u512a\u52e2\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<code>VPS<\/code>\u3001<code>\u9999\u6e2fVPS<\/code>\u3001<code>\u4f3a\u670d\u5668<\/code>\u53ca<code>\u96f2\u4f3a\u670d\u5668<\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0eDB2\u6578\u64da\u5eab\u4e2d\u7684OLAP\u51fd\u6578\uff0c\u63d0\u4f9b\u4f7f\u7528\u6280\u5de7\u8207\u5be6\u4f8b\uff0c\u52a9\u60a8\u63d0\u5347\u6578\u64da\u5206\u6790\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-60647","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60647","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=60647"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60647\/revisions"}],"predecessor-version":[{"id":60648,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60647\/revisions\/60648"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60647"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60647"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60647"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}