{"id":28308,"date":"2022-12-30T02:41:38","date_gmt":"2022-12-29T21:11:38","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-compare-values-in-sql-using-case-if-match-return-and-exit-from-case-statement-closed\/"},"modified":"2022-12-30T02:41:38","modified_gmt":"2022-12-29T21:11:38","slug":"solved-compare-values-in-sql-using-case-if-match-return-and-exit-from-case-statement-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-compare-values-in-sql-using-case-if-match-return-and-exit-from-case-statement-closed\/","title":{"rendered":"[Solved] Compare values in SQL using CASE, if match return and exit from CASE statement [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-33695903\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"33695903\" data-parentid=\"33694998\" 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>I will use postgres for this example, I use row_number() and cte, if you have mySql will need a workaorund<\/p>\n<p>You need a table priority<\/p>\n<pre><code>CREATE TABLE priority\n    (\"PhoneType\" int, \"Priority\" int)\n;\n\nINSERT INTO priority\n    (\"PhoneType\", \"Priority\")\nVALUES\n    (7, 1),        (6, 2),\n    (1, 3),        (2, 4),\n    (3, 5),        (4, 6),\n    (5, 7),        (8, 8),\n    (9, 9)    ;\n<\/code><\/pre>\n<p>Then put a <code>rownumber<\/code> to each phonetype acording to priority<\/p>\n<pre><code>WITH cte as (\n    SELECT \n          p.*,\n          pr.\"Priority\",\n          row_number() over (partition by \"PersonID\" ORDER BY \"Priority\") as rn\n    FROM person p\n    JOIN priority pr\n      ON p.\"PhoneType\" = pr.\"PhoneType\"\n    ORDER BY pr.\"Priority\"\n)\nSELECT \n    c.\"PersonID\",\n    c.\"PhoneType\", \n    c.\"PhoneNumber\",\n    CASE rn \n       WHEN 1 THEN 1\n       ELSE NULL\n    END as rn\nFROM cte c\n<\/code><\/pre>\n<p><strong><a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/sqlfiddle.com\/#!15\/f1f1a\/1\">SqlFiddle Demo<\/a><\/strong><\/p>\n<p><strong>OUTPUT<\/strong><\/p>\n<pre><code>| PersonID | PhoneType | PhoneNumber |     rn |\n|----------|-----------|-------------|--------|\n|        1 |         7 |  7735487695 |      1 |\n|        1 |         1 |  7731234569 | (null) |\n|        1 |         5 |  7731547895 | (null) |\n<\/code><\/pre>\n<p>NOTE: I also change type <code>6 =&gt; 5<\/code> in your sample to highlight even more how the priority is working<\/p>\n<p>After your edit <strong><a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/sqlfiddle.com\/#!6\/09ec48\/3\">SQL Server verion without table Fiddle<\/a><\/strong><\/p>\n<pre><code>With Priority as (\n    SELECT 7 as PhoneType,  1 as Priority UNION ALL\n    SELECT 6 as PhoneType,  2 as Priority UNION ALL\n    SELECT 1 as PhoneType,  3 as Priority UNION ALL\n    SELECT 2 as PhoneType,  4 as Priority UNION ALL\n    SELECT 3 as PhoneType,  5 as Priority UNION ALL\n    SELECT 4 as PhoneType,  6 as Priority UNION ALL\n    SELECT 5 as PhoneType,  7 as Priority UNION ALL\n    SELECT 8 as PhoneType,  8 as Priority UNION ALL\n    SELECT 9 as PhoneType,  9 as Priority \n), \ncte as (\n    SELECT \n          p.*,\n          pr.Priority,\n          row_number() over (partition by PersonID ORDER BY Priority) as rn\n    FROM Person p\n    JOIN Priority pr\n      ON p.PhoneType = pr.PhoneType    \n)\nSELECT \n    c.PersonID,\n    c.PhoneType, \n    c.PhoneNumber\nFROM cte c\nWHERE rn = 1 \n<\/code><\/pre>\n<p><strong>OUTPUT<\/strong><\/p>\n<pre><code>| PersonID | PhoneType | PhoneNumber |\n|----------|-----------|-------------|\n|        1 |         7 |  7735821547 |\n|        2 |         1 |  7731547841 |\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">2<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Compare values in SQL using CASE, if match return and exit from CASE statement [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] I will use postgres for this example, I use row_number() and cte, if you have mySql will need a workaorund You need a table priority CREATE TABLE priority (&#8220;PhoneType&#8221; int, &#8220;Priority&#8221; int) ; INSERT INTO priority (&#8220;PhoneType&#8221;, &#8220;Priority&#8221;) VALUES (7, 1), (6, 2), (1, 3), (2, 4), (3, 5), (4, 6), (5, 7), (8, &#8230; <a title=\"[Solved] Compare values in SQL using CASE, if match return and exit from CASE statement [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-compare-values-in-sql-using-case-if-match-return-and-exit-from-case-statement-closed\/\" aria-label=\"More on [Solved] Compare values in SQL using CASE, if match return and exit from CASE statement [closed]\">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],"class_list":["post-28308","post","type-post","status-publish","format-standard","hentry","category-solved","tag-sql"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>[Solved] Compare values in SQL using CASE, if match return and exit from CASE statement [closed] - 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-compare-values-in-sql-using-case-if-match-return-and-exit-from-case-statement-closed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Compare values in SQL using CASE, if match return and exit from CASE statement [closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] I will use postgres for this example, I use row_number() and cte, if you have mySql will need a workaorund You need a table priority CREATE TABLE priority (&quot;PhoneType&quot; 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