{"id":95952,"date":"2024-10-20T05:22:17","date_gmt":"2024-10-19T21:22:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95952\/"},"modified":"2024-10-20T05:22:17","modified_gmt":"2024-10-19T21:22:17","slug":"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%adrank%e7%ad%89%e5%87%bd%e6%95%b8%e7%9a%84%e6%af%94%e8%bc%83%e8%88%87%e9%81%b8%e6%93%87","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95952\/","title":{"rendered":"Oracle\u6578\u64da\u5eab\u4e2dRANK\u7b49\u51fd\u6578\u7684\u6bd4\u8f03\u8207\u9078\u64c7"},"content":{"rendered":"<h1 id=\"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%adrank%e7%ad%89%e5%87%bd%e6%95%b8%e7%9a%84%e6%af%94%e8%bc%83%e8%88%87%e9%81%b8%e6%93%87-yRXTiFFQhN\">Oracle\u6578\u64da\u5eab\u4e2dRANK\u7b49\u51fd\u6578\u7684\u6bd4\u8f03\u8207\u9078\u64c7<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u5206\u6790\u51fd\u6578\u662f\u7528\u4f86\u9032\u884c\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u7684\u91cd\u8981\u5de5\u5177\u3002Oracle\u6578\u64da\u5eab\u63d0\u4f9b\u4e86\u591a\u7a2e\u5206\u6790\u51fd\u6578\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u5305\u62ecRANK\u3001DENSE_RANK\u548cROW_NUMBER\u3002\u9019\u4e9b\u51fd\u6578\u5728\u8655\u7406\u6392\u5e8f\u548c\u5206\u7d44\u6578\u64da\u6642\u5404\u6709\u5176\u7279\u9ede\u548c\u9069\u7528\u5834\u666f\u3002\u672c\u6587\u5c07\u5c0d\u9019\u4e9b\u51fd\u6578\u9032\u884c\u6bd4\u8f03\u8207\u9078\u64c7\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5b83\u5011\u7684\u4f7f\u7528\u60c5\u5883\u3002<\/p>\n<h2 id=\"1-rank%e5%87%bd%e6%95%b8-yRXTiFFQhN\">1. RANK\u51fd\u6578<\/h2>\n<p>RANK\u51fd\u6578\u7528\u65bc\u70ba\u67e5\u8a62\u7d50\u679c\u4e2d\u7684\u6bcf\u4e00\u884c\u5206\u914d\u4e00\u500b\u6392\u540d\uff0c\u4e26\u4e14\u5728\u9047\u5230\u76f8\u540c\u503c\u6642\u6703\u7d66\u4e88\u76f8\u540c\u7684\u6392\u540d\u3002\u9019\u610f\u5473\u8457\u5982\u679c\u6709\u591a\u884c\u6578\u64da\u7684\u503c\u76f8\u540c\uff0c\u9019\u4e9b\u884c\u5c07\u6703\u7372\u5f97\u76f8\u540c\u7684\u6392\u540d\uff0c\u800c\u4e0b\u4e00\u500b\u6392\u540d\u5c07\u6703\u8df3\u904e\u76f8\u61c9\u7684\u6578\u91cf\u3002<\/p>\n<pre><code>SELECT employee_id, salary, RANK() OVER (ORDER BY salary DESC) AS rank\nFROM employees;\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u67e5\u8a62\u4e2d\uff0c\u6839\u64da\u85aa\u6c34\u7684\u964d\u5e8f\u6392\u5217\uff0cRANK\u51fd\u6578\u5c07\u70ba\u6bcf\u4f4d\u54e1\u5de5\u5206\u914d\u4e00\u500b\u6392\u540d\u3002\u5982\u679c\u6709\u5169\u4f4d\u54e1\u5de5\u7684\u85aa\u6c34\u76f8\u540c\uff0c\u4ed6\u5011\u5c07\u7372\u5f97\u76f8\u540c\u7684\u6392\u540d\uff0c\u800c\u4e0b\u4e00\u4f4d\u54e1\u5de5\u7684\u6392\u540d\u5c07\u6703\u8df3\u904e\u4e00\u4f4d\u3002<\/p>\n<h2 id=\"2-dense_rank%e5%87%bd%e6%95%b8-yRXTiFFQhN\">2. DENSE_RANK\u51fd\u6578<\/h2>\n<p>DENSE_RANK\u51fd\u6578\u8207RANK\u51fd\u6578\u985e\u4f3c\uff0c\u4f46\u5728\u9047\u5230\u76f8\u540c\u503c\u6642\uff0c\u5b83\u4e0d\u6703\u8df3\u904e\u6392\u540d\u3002\u9019\u610f\u5473\u8457\u5373\u4f7f\u6709\u591a\u884c\u6578\u64da\u7684\u503c\u76f8\u540c\uff0c\u4e0b\u4e00\u500b\u6392\u540d\u4ecd\u7136\u6703\u662f\u9023\u7e8c\u7684\u3002<\/p>\n<pre><code>SELECT employee_id, salary, DENSE_RANK() OVER (ORDER BY salary DESC) AS dense_rank\nFROM employees;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u5982\u679c\u6709\u5169\u4f4d\u54e1\u5de5\u7684\u85aa\u6c34\u76f8\u540c\uff0c\u4ed6\u5011\u5c07\u7372\u5f97\u76f8\u540c\u7684\u6392\u540d\uff0c\u800c\u4e0b\u4e00\u4f4d\u54e1\u5de5\u7684\u6392\u540d\u5c07\u662f\u9023\u7e8c\u7684\uff0c\u4e0d\u6703\u8df3\u904e\u3002<\/p>\n<h2 id=\"3-row_number%e5%87%bd%e6%95%b8-yRXTiFFQhN\">3. ROW_NUMBER\u51fd\u6578<\/h2>\n<p>ROW_NUMBER\u51fd\u6578\u5247\u662f\u70ba\u6bcf\u4e00\u884c\u5206\u914d\u4e00\u500b\u552f\u4e00\u7684\u5e8f\u865f\uff0c\u7121\u8ad6\u6578\u64da\u662f\u5426\u76f8\u540c\u3002\u9019\u610f\u5473\u8457\u5373\u4f7f\u6709\u591a\u884c\u6578\u64da\u7684\u503c\u76f8\u540c\uff0c\u6bcf\u4e00\u884c\u4ecd\u7136\u6703\u7372\u5f97\u4e0d\u540c\u7684\u5e8f\u865f\u3002<\/p>\n<pre><code>SELECT employee_id, salary, ROW_NUMBER() OVER (ORDER BY salary DESC) AS row_num\nFROM employees;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6bcf\u4f4d\u54e1\u5de5\u90fd\u6703\u7372\u5f97\u4e00\u500b\u552f\u4e00\u7684\u5e8f\u865f\uff0c\u5373\u4f7f\u4ed6\u5011\u7684\u85aa\u6c34\u76f8\u540c\u3002<\/p>\n<h2 id=\"4-%e5%87%bd%e6%95%b8%e9%81%b8%e6%93%87%e7%9a%84%e8%80%83%e9%87%8f-yRXTiFFQhN\">4. \u51fd\u6578\u9078\u64c7\u7684\u8003\u91cf<\/h2>\n<p>\u5728\u9078\u64c7\u4f7f\u7528RANK\u3001DENSE_RANK\u6216ROW_NUMBER\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u8003\u616e\u4ee5\u4e0b\u5e7e\u500b\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u7684\u6027\u8cea\uff1a<\/strong>\u5982\u679c\u6578\u64da\u4e2d\u5b58\u5728\u91cd\u8907\u503c\u4e14\u9700\u8981\u4fdd\u7559\u9019\u4e9b\u91cd\u8907\u503c\u7684\u6392\u540d\uff0c\u5247\u61c9\u9078\u64c7RANK\u6216DENSE_RANK\u3002<\/li>\n<li><strong>\u6392\u540d\u7684\u9023\u7e8c\u6027\uff1a<\/strong>\u5982\u679c\u9700\u8981\u9023\u7e8c\u7684\u6392\u540d\uff0c\u5247\u61c9\u9078\u64c7DENSE_RANK\u3002<\/li>\n<li><strong>\u552f\u4e00\u6027\u9700\u6c42\uff1a<\/strong>\u5982\u679c\u6bcf\u4e00\u884c\u90fd\u9700\u8981\u4e00\u500b\u552f\u4e00\u7684\u5e8f\u865f\uff0c\u5247\u61c9\u9078\u64c7ROW_NUMBER\u3002<\/li>\n<\/ul>\n<h2 id=\"5-%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e6%a1%88%e4%be%8b-yRXTiFFQhN\">5. \u5be6\u969b\u61c9\u7528\u6848\u4f8b<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u7528\u65bc\u751f\u6210\u5831\u544a\u3001\u5206\u6790\u696d\u52d9\u7e3e\u6548\u7b49\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u500b\u92b7\u552e\u5831\u544a\u4e2d\uff0c\u4f7f\u7528RANK\u53ef\u4ee5\u5e6b\u52a9\u8b58\u5225\u92b7\u552e\u8868\u73fe\u6700\u597d\u7684\u54e1\u5de5\uff0c\u800c\u4f7f\u7528DENSE_RANK\u5247\u53ef\u4ee5\u5e6b\u52a9\u4e86\u89e3\u92b7\u552e\u5718\u968a\u7684\u6574\u9ad4\u8868\u73fe\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-yRXTiFFQhN\">\u7e3d\u7d50<\/h2>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0cRANK\u3001DENSE_RANK\u548cROW_NUMBER\u662f\u4e09\u500b\u91cd\u8981\u7684\u5206\u6790\u51fd\u6578\uff0c\u5404\u81ea\u6709\u5176\u7279\u9ede\u548c\u9069\u7528\u5834\u666f\u3002\u9078\u64c7\u5408\u9069\u7684\u51fd\u6578\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u8655\u7406\u6578\u64da\u5206\u6790\u4efb\u52d9\u3002\u4e86\u89e3\u9019\u4e9b\u51fd\u6578\u7684\u4f7f\u7528\u60c5\u5883\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u548c\u6e96\u78ba\u6027\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc\u6578\u64da\u5eab\u548c\u96f2\u8a08\u7b97\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u6211\u5011\u63d0\u4f9b\u5404\u985e <a href=\"https:\/\/server.hk\">VPS<\/a> \u53ca <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6bd4\u8f03Oracle\u6578\u64da\u5eab\u4e2d\u7684RANK\u3001DENSE_RANK\u548cROW_NUMBER\u51fd\u6578\uff0c\u5e6b\u52a9\u9078\u64c7\u6700\u9069\u5408\u7684\u6392\u5e8f\u548c\u5206\u7d44\u65b9\u6cd5\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-95952","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95952","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=95952"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95952\/revisions"}],"predecessor-version":[{"id":95953,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95952\/revisions\/95953"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95952"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95952"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95952"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}