{"id":33392,"date":"2023-02-07T14:41:30","date_gmt":"2023-02-07T09:11:30","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-t-sql-to-generate-expect-result\/"},"modified":"2023-02-07T14:41:30","modified_gmt":"2023-02-07T09:11:30","slug":"solved-t-sql-to-generate-expect-result","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-t-sql-to-generate-expect-result\/","title":{"rendered":"[Solved] T-SQL to generate expect result"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-32247192\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"32247192\" data-parentid=\"32241058\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Assuming that I understand the problem:<\/p>\n<ul>\n<li>you have a number of rows with sections (&#8220;Cates&#8221;) and symbols (&#8220;Type&#8221;);<\/li>\n<li>if there are any symbols ending in a minus sign then these indicate a row without a minus sign should be removed;<\/li>\n<li>symbols are never &#8220;mixed&#8221; per section, i.e. a section can never have &#8220;A&#8221; and &#8220;B-&#8220;;<\/li>\n<li>there will always be a row to remove if there is a type with a minus;<\/li>\n<li>rows should be removed starting with the lowest Id.<\/li>\n<\/ul>\n<p>Then this should work:<\/p>\n<pre><code>DECLARE @data TABLE (\n    Id INT,\n    Cate VARCHAR(5),\n    [Type] VARCHAR(2));\nINSERT INTO @data SELECT 1, 'AM001', 'A';\nINSERT INTO @data SELECT 2, 'AM001', 'A-';\nINSERT INTO @data SELECT 3, 'AM001', 'A';\nINSERT INTO @data SELECT 4, 'AM003', 'B';\nINSERT INTO @data SELECT 6, 'AM003', 'B';\nINSERT INTO @data SELECT 7, 'AM005', 'B';\nINSERT INTO @data SELECT 8, 'AM005', 'B-';\nINSERT INTO @data SELECT 9, 'AM005', 'B';\nINSERT INTO @data SELECT 10, 'AM006', 'A';\nINSERT INTO @data SELECT 11, 'AM006', 'A';\nINSERT INTO @data SELECT 12, 'AM011', 'B';\nINSERT INTO @data SELECT 13, 'AM011', 'B-';\nINSERT INTO @data SELECT 14, 'AM011', 'B';\nWITH NumberToRemove AS (\n    SELECT\n        Cate,\n        COUNT(*) AS TakeOff\n    FROM\n        @data\n    WHERE\n        [Type] LIKE '_-'\n    GROUP BY\n        Cate),\nOrdered AS (\n    SELECT\n        Id,\n        Cate,\n        [Type],\n        ROW_NUMBER() OVER (PARTITION BY Cate ORDER BY Id) AS RowId\n    FROM\n        @data\n    WHERE\n        [Type] NOT LIKE '_-')\nSELECT\n    d.*\nFROM\n    @data d\n    LEFT JOIN NumberToRemove m ON m.Cate = d.Cate\n    INNER JOIN Ordered o ON o.Id = d.Id\nWHERE\n    o.RowId &gt; ISNULL(m.TakeOff, 0);\n<\/code><\/pre>\n<p>The query works by first counting the number of rows to remove from each section (&#8220;Cate&#8221;) by tallying up the number of symbols with a minus sign per section.  Next it sorts the rows where the symbols don&#8217;t have a minus sign and assigns each row a number in Id order (&#8220;row number&#8221;), starting back at 1 for each new section (&#8220;Cate&#8221;).<\/p>\n<p>Finally I just pick the rows without a minus sign symbol, where the row number is greater than the number that were to be removed.  Note that if a section has no rows to remove then it will return NULL rows to remove, so I transform this to 0, because ALL rows in that section with have a row number greater than 0.<\/p>\n<p>My results were:<\/p>\n<pre><code>Id  Cate    Type\n3   AM001   A\n4   AM003   B\n6   AM003   B\n9   AM005   B\n10  AM006   A\n11  AM006   A\n14  AM011   B\n<\/code><\/pre>\n<p>If my assumptions were incorrect then this script could easily be amended to suit&#8230;<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">0<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved T-SQL to generate expect result <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Assuming that I understand the problem: you have a number of rows with sections (&#8220;Cates&#8221;) and symbols (&#8220;Type&#8221;); if there are any symbols ending in a minus sign then these indicate a row without a minus sign should be removed; symbols are never &#8220;mixed&#8221; per section, i.e. a section can never have &#8220;A&#8221; and &#8230; <a title=\"[Solved] T-SQL to generate expect result\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-t-sql-to-generate-expect-result\/\" aria-label=\"More on [Solved] T-SQL to generate expect result\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[341,500,1009],"class_list":["post-33392","post","type-post","status-publish","format-standard","hentry","category-solved","tag-sql","tag-sql-server","tag-tsql"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] T-SQL to generate expect result - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-t-sql-to-generate-expect-result\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] T-SQL to generate expect result - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Assuming that I understand the problem: you have a number of rows with sections (&#8220;Cates&#8221;) and symbols (&#8220;Type&#8221;); if there are any symbols ending in a minus sign then these indicate a row without a minus sign should be removed; symbols are never &#8220;mixed&#8221; per section, i.e. a section can never have &#8220;A&#8221; and ... 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