{"id":3087,"date":"2015-11-17T22:31:08","date_gmt":"2015-11-17T14:31:08","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=3087"},"modified":"2015-11-17T22:31:08","modified_gmt":"2015-11-17T14:31:08","slug":"%e6%95%b0%e6%8d%ae%e5%ba%93-%e5%8f%96%e6%8c%87%e5%ae%9a%e8%a1%a8%e4%b8%ad%e6%9f%90%e5%ad%97%e6%ae%b5%e7%9a%84%e7%b4%af%e5%8a%a0%e5%92%8c%e4%b8%8d%e8%b6%85%e8%bf%87%e6%80%bb%e5%92%8c80%e7%9a%84","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=3087","title":{"rendered":"[\u6570\u636e\u5e93]  \u53d6\u6307\u5b9a\u8868\u4e2d\u67d0\u5b57\u6bb5\u7684\u7d2f\u52a0\u548c\u4e0d\u8d85\u8fc7\u603b\u548c80%\u7684\u884c"},"content":{"rendered":"<p>\u6709\u8868 Table_1\uff0c \u5b57\u6bb5 Value int,\u00a0 P float \u30025<\/p>\n<p>\u8981\u53d6\u51fa\u4ee5 Value \u5b57\u6bb5\u5012\u5e8f\u7684 P \u5b57\u6bb5\u7d2f\u52a0\u548c \u4e0d\u8d85\u8fc7 \u6574\u4e2a\u8868\u4e2dP\u5b57\u6bb5\u603b\u548c\u7684 80%\u7684\u884c\u3002\u00a0 \u5e76\u5728\u8fd4\u56de\u5217\u8868\u4e2d \u52a0\u5165\u5b57\u6bb5 SUM \uff0c\u5b58\u653e\u5f53\u524d\u884c\u4e0e\u524d\u9762\u6240\u6709\u884c\u7684\u7d2f\u52a0\u548c\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3088\" src=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2015\/11\/\u65e0\u6807\u9898.jpg\" alt=\"\u65e0\u6807\u9898\" width=\"535\" height=\"493\" srcset=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2015\/11\/\u65e0\u6807\u9898.jpg 535w, https:\/\/blog.qdac.cc\/wp-content\/uploads\/2015\/11\/\u65e0\u6807\u9898-300x276.jpg 300w\" sizes=\"auto, (max-width: 535px) 100vw, 535px\" \/><\/p>\n<p>\u6298\u817e\u4e86\u534a\u5929\uff0c \u5199\u4e86\u4e0b\u9762\u7684\u67e5\u8be2sql:<\/p>\n<pre class=\"lang:plsql decode:true \">declare @e float\r\n\r\nselect @e = sum(P) from [Table_1]\r\nSet @e = @e * 0.8\r\n\r\n;with T as (\r\n        select [ID] = row_number() over(order by [Value] desc), [Value], [P],\r\n            (select sum(P) from [Table_1] a where a.[Value] &gt;= b.[Value]) 'SUM'\r\n        from [Table_1] b\r\n)\r\nselect * from T where [SUM] &lt;= @e<\/pre>\n<p>&nbsp;<\/p>\n<p>\u5171\u751f\u6210\u4e86 1.1 \u4e07\u884c\u6d4b\u8bd5\u6570\u636e\uff0c \u6d4b\u8bd5\u7528\u8bd5 12 \u79d2\uff0c \u8fd0\u884c\u6548\u679c\u56fe\u548c\u539f\u6570\u636e\u5982\u4e0a\u56fe\u6240\u793a\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6709\u8868 Table_1\uff0c \u5b57\u6bb5 Value [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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