{"id":160201,"date":"2024-11-03T21:07:20","date_gmt":"2024-11-03T13:07:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160201\/"},"modified":"2024-11-03T21:07:21","modified_gmt":"2024-11-03T13:07:21","slug":"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-percent_rank","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160201\/","title":{"rendered":"OceanBase \u6559\u7a0b\uff1aOceanBase PERCENT_RANK"},"content":{"rendered":"<h1 id=\"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-percent_rank-PUDvkatqmM\">OceanBase \u6559\u7a0b\uff1aOceanBase PERCENT_RANK<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cOceanBase \u4f5c\u70ba\u4e00\u500b\u9ad8\u6027\u80fd\u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u8d8a\u4f86\u8d8a\u53d7\u5230\u958b\u767c\u8005\u548c\u4f01\u696d\u7684\u9752\u775e\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e OceanBase \u4e2d\u7684 PERCENT_RANK \u51fd\u6578\uff0c\u9019\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5206\u6790\u51fd\u6578\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u8a08\u7b97\u6578\u64da\u96c6\u4e2d\u7684\u767e\u5206\u6bd4\u6392\u540d\u3002<\/p>\n<h2 id=\"percent_rank-%e5%87%bd%e6%95%b8%e6%a6%82%e8%bf%b0-PUDvkatqmM\">PERCENT_RANK \u51fd\u6578\u6982\u8ff0<\/h2>\n<p>PERCENT_RANK \u51fd\u6578\u7528\u65bc\u8a08\u7b97\u67d0\u4e00\u884c\u5728\u7d50\u679c\u96c6\u4e2d\u7684\u76f8\u5c0d\u6392\u540d\uff0c\u4e26\u4ee5\u767e\u5206\u6bd4\u7684\u5f62\u5f0f\u8868\u793a\u3002\u9019\u500b\u51fd\u6578\u7684\u8a08\u7b97\u65b9\u5f0f\u662f\u57fa\u65bc\u8a72\u884c\u7684\u6392\u540d\u8207\u7e3d\u884c\u6578\u4e4b\u9593\u7684\u6bd4\u4f8b\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>PERCENT_RANK() OVER (PARTITION BY partition_expression ORDER BY order_expression)\n<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>PARTITION BY<\/code> \u5b50\u53e5\u7528\u65bc\u5c07\u7d50\u679c\u96c6\u5283\u5206\u70ba\u4e0d\u540c\u7684\u7d44\uff0c\u800c <code>ORDER BY<\/code> \u5b50\u53e5\u5247\u7528\u65bc\u6307\u5b9a\u6392\u540d\u7684\u9806\u5e8f\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-PUDvkatqmM\">\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u70ba\u4e86\u66f4\u597d\u5730\u7406\u89e3 PERCENT_RANK \u51fd\u6578\u7684\u4f7f\u7528\uff0c\u6211\u5011\u53ef\u4ee5\u901a\u904e\u4e00\u500b\u5177\u9ad4\u7684\u4f8b\u5b50\u4f86\u8aaa\u660e\u3002\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\uff0c\u8a72\u8868\u5305\u542b\u54e1\u5de5\u7684\u85aa\u8cc7\u4fe1\u606f\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre><code>CREATE TABLE employees (\n    id INT,\n    name VARCHAR(50),\n    salary DECIMAL(10, 2)\n);\n\nINSERT INTO employees (id, name, salary) VALUES\n(1, 'Alice', 70000),\n(2, 'Bob', 50000),\n(3, 'Charlie', 60000),\n(4, 'David', 80000),\n(5, 'Eve', 90000);\n<\/code><\/pre>\n<p>\u73fe\u5728\uff0c\u6211\u5011\u5e0c\u671b\u8a08\u7b97\u6bcf\u4f4d\u54e1\u5de5\u7684\u85aa\u8cc7\u5728\u6240\u6709\u54e1\u5de5\u4e2d\u7684\u767e\u5206\u6bd4\u6392\u540d\u3002\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>SELECT \n    name,\n    salary,\n    PERCENT_RANK() OVER (ORDER BY salary) AS percent_rank\nFROM \n    employees;\n<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u67e5\u8a62\u5f8c\uff0c\u6211\u5011\u5c07\u5f97\u5230\u6bcf\u4f4d\u54e1\u5de5\u7684\u85aa\u8cc7\u53ca\u5176\u76f8\u5c0d\u65bc\u5176\u4ed6\u54e1\u5de5\u7684\u767e\u5206\u6bd4\u6392\u540d\u3002\u7d50\u679c\u53ef\u80fd\u5982\u4e0b\uff1a<\/p>\n<pre><code>name      | salary  | percent_rank\n---------- | ------- | ------------\nBob       | 50000   | 0.00\nCharlie   | 60000   | 0.25\nAlice     | 70000   | 0.50\nDavid     | 80000   | 0.75\nEve       | 90000   | 1.00\n<\/code><\/pre>\n<h2 id=\"percent_rank-%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-PUDvkatqmM\">PERCENT_RANK \u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>PERCENT_RANK \u51fd\u6578\u5728\u8a31\u591a\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u9032\u884c\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u7684\u60c5\u6cc1\u4e0b\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u61c9\u7528\u5834\u666f\uff1a<\/p>\n<ul>\n<li><strong>\u696d\u7e3e\u8a55\u4f30\uff1a<\/strong>\u4f01\u696d\u53ef\u4ee5\u4f7f\u7528 PERCENT_RANK \u4f86\u8a55\u4f30\u54e1\u5de5\u7684\u696d\u7e3e\uff0c\u5e6b\u52a9\u7ba1\u7406\u5c64\u505a\u51fa\u66f4\u660e\u667a\u7684\u6c7a\u7b56\u3002<\/li>\n<li><strong>\u5e02\u5834\u5206\u6790\uff1a<\/strong>\u5728\u5e02\u5834\u7814\u7a76\u4e2d\uff0cPERCENT_RANK \u53ef\u4ee5\u5e6b\u52a9\u5206\u6790\u7522\u54c1\u7684\u5e02\u5834\u8868\u73fe\uff0c\u4e86\u89e3\u5176\u5728\u7af6\u722d\u4e2d\u7684\u4f4d\u7f6e\u3002<\/li>\n<li><strong>\u5b78\u751f\u6210\u7e3e\u6392\u540d\uff1a<\/strong>\u5b78\u6821\u53ef\u4ee5\u5229\u7528\u6b64\u51fd\u6578\u4f86\u8a08\u7b97\u5b78\u751f\u7684\u6210\u7e3e\u6392\u540d\uff0c\u5e6b\u52a9\u6559\u5e2b\u548c\u5b78\u751f\u4e86\u89e3\u5b78\u7fd2\u9032\u5ea6\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-PUDvkatqmM\">\u7e3d\u7d50<\/h2>\n<p>PERCENT_RANK \u51fd\u6578\u662f OceanBase \u4e2d\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u8f15\u9b06\u8a08\u7b97\u6578\u64da\u96c6\u4e2d\u7684\u767e\u5206\u6bd4\u6392\u540d\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u6b64\u51fd\u6578\uff0c\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u53ef\u4ee5\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u80cc\u5f8c\u7684\u610f\u7fa9\uff0c\u4e26\u505a\u51fa\u66f4\u5177\u6d1e\u5bdf\u529b\u7684\u6c7a\u7b56\u3002\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6709\u8208\u8da3\uff0c\u4e26\u5e0c\u671b\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u4f86\u642d\u5efa\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u4eab\u53d7\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how to use OceanBase&#8217;s PERCENT_RANK function in this comprehensive tutorial, enhancing your data analysis skills with practical examples.<\/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-160201","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160201","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=160201"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160201\/revisions"}],"predecessor-version":[{"id":160202,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160201\/revisions\/160202"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160201"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160201"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160201"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}