{"id":881,"date":"2014-09-16T10:12:06","date_gmt":"2014-09-16T14:12:06","guid":{"rendered":"http:\/\/binaryworld.net\/blogs\/?p=881"},"modified":"2015-12-01T16:37:35","modified_gmt":"2015-12-01T21:37:35","slug":"distinct-vs-group-by-performance-for-t-sql-query","status":"publish","type":"post","link":"https:\/\/binaryworld.net\/blogs\/distinct-vs-group-by-performance-for-t-sql-query\/","title":{"rendered":"DISTINCT vs GROUP BY Performance in SQL Query"},"content":{"rendered":"<p>If you ever wonder which one is really faster in <strong>Distinct vs Group By Performance Test<\/strong>\u00a0then I will show some facts in this post so you can\u00a0write your query accordingly.\u00a0\u00a0<\/p>\n<p>To test <em>distinct vs group by performance<\/em> in SQL Query I wrote essentially same query using two different ways. I compared execution plan generated by SQL Server. Here is my result. Looks like SQL Server was smart enough to detect that I am trying to get same result so it generated same execution plan.<\/p>\n<p>So in short if you are worried about performance then take a deep breath coz SQL Server will do exactly same thing in both case.<\/p>\n<p><a href=\"http:\/\/binaryworld.net\/blogs\/wp-content\/uploads\/2014\/09\/t-sql-distinct-vs-group-by-performance.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-882\" alt=\"t-sql-distinct-vs-group-by-performance\" src=\"http:\/\/binaryworld.net\/blogs\/wp-content\/uploads\/2014\/09\/t-sql-distinct-vs-group-by-performance.jpg\" width=\"816\" height=\"428\" srcset=\"https:\/\/binaryworld.net\/blogs\/wp-content\/uploads\/2014\/09\/t-sql-distinct-vs-group-by-performance.jpg 816w, https:\/\/binaryworld.net\/blogs\/wp-content\/uploads\/2014\/09\/t-sql-distinct-vs-group-by-performance-300x157.jpg 300w, https:\/\/binaryworld.net\/blogs\/wp-content\/uploads\/2014\/09\/t-sql-distinct-vs-group-by-performance-100x52.jpg 100w, https:\/\/binaryworld.net\/blogs\/wp-content\/uploads\/2014\/09\/t-sql-distinct-vs-group-by-performance-150x78.jpg 150w, https:\/\/binaryworld.net\/blogs\/wp-content\/uploads\/2014\/09\/t-sql-distinct-vs-group-by-performance-200x104.jpg 200w, https:\/\/binaryworld.net\/blogs\/wp-content\/uploads\/2014\/09\/t-sql-distinct-vs-group-by-performance-450x236.jpg 450w, https:\/\/binaryworld.net\/blogs\/wp-content\/uploads\/2014\/09\/t-sql-distinct-vs-group-by-performance-600x314.jpg 600w\" sizes=\"(max-width: 816px) 100vw, 816px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>If you ever wonder which one is really faster in Distinct vs Group By Performance Test\u00a0then I will show some facts in this post so you can\u00a0write your query accordingly.\u00a0\u00a0 To test distinct vs group by performance in SQL Query &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"more-link\" href=\"https:\/\/binaryworld.net\/blogs\/distinct-vs-group-by-performance-for-t-sql-query\/\"> <span class=\"screen-reader-text\">DISTINCT vs GROUP BY Performance in SQL Query<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":606,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27,35],"tags":[158,130,138],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\r\n<title>DISTINCT vs GROUP BY Performance in SQL Query - BinaryWorld Blog<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/binaryworld.net\/blogs\/distinct-vs-group-by-performance-for-t-sql-query\/\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"DISTINCT vs GROUP BY Performance in SQL Query - BinaryWorld Blog\" \/>\r\n<meta property=\"og:description\" content=\"If you ever wonder which one is really faster in Distinct vs Group By Performance Test\u00a0then I will show some facts in this post so you can\u00a0write your query accordingly.\u00a0\u00a0 To test distinct vs group by performance in SQL Query &hellip; 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