{"id":111191,"date":"2026-06-03T12:19:31","date_gmt":"2026-06-03T12:19:31","guid":{"rendered":"https:\/\/www.red-gate.com\/simple-talk\/?post_type=collection&p=111191"},"modified":"2026-06-03T12:25:30","modified_gmt":"2026-06-03T12:25:30","slug":"window-function-performance-in-sql-server-a-complete-guide","status":"publish","type":"collection","link":"https:\/\/www.red-gate.com\/simple-talk\/collections\/window-function-performance-in-sql-server-a-complete-guide\/","title":{"rendered":"Window function performance in SQL Server: a complete guide"},"content":{"rendered":"\n

Learn everything you need to know about window function performance in SQL Server with SQL veteran Fabiano Amorim’s detailed three-piece guide series. Everything is covered, including (but not limited to):<\/strong><\/p>\n\n\n

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  1. The basics of window functions – the history, what they are, etc;

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  2. Why window functions are powerful (and so important to use);

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  3. Window functions in various iterations of SQL Server over the years;

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  4. The window function and window frame;

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  5. Execution plans for running aggregates.<\/li>\n<\/ol>\n<\/div>\n\n\n

    And much more! Here are the three guides for you to enjoy:<\/p>\n\n\n\n

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    \n \n\t\t\t\t\t\t\t\t\t\t\t\t\tSQL Server<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\"Simple-Talk\n\t\t\t<\/a> <\/div>\n
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    \n \n \n \"Image\n Fabiano Amorim<\/span>\n <\/a>\n\n \n in<\/span>\n \n SQL Server <\/a>\n <\/span>\n<\/div>\n\n
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    \n SQL Server Window Function Performance: Execution Plans for Running Aggregates, LEAD, LAG, FIRST_VALUE, LAST_VALUE <\/h1>\n

    \n Performance analysis of SQL Server window functions – comparing execution plans for running aggregations (OVER + ORDER BY), LEAD and… <\/p>\n <\/div>\n

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    \n \n\t\t\t\t\t\t\t\t\t\t\t\t\tSQL Server<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\"Simple-Talk\n\t\t\t<\/a> <\/div>\n
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    \n \n \n \"Image\n Fabiano Amorim<\/span>\n <\/a>\n\n \n in<\/span>\n \n SQL Server <\/a>\n <\/span>\n<\/div>\n\n
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    \n Window Functions in SQL Server: Part 2-The Frame <\/h1>\n

    \n Fabiano continues his introduction to SQL Server’s implementation of the window functions by giving a history of what got implemented… <\/p>\n <\/div>\n

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    \n \n\t\t\t\t\t\t\t\t\t\t\t\t\tSQL Server<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\"Simple-Talk\n\t\t\t<\/a> <\/div>\n
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    \n \n \n \"Image\n Fabiano Amorim<\/span>\n <\/a>\n\n \n in<\/span>\n \n SQL Server <\/a>\n <\/span>\n<\/div>\n\n
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    \n Window Functions in SQL Server <\/h1>\n

    \n When SQL Server introduced Window Functions in SQL Server 2005, it was done in a rather tentative way, with only… <\/p>\n <\/div>\n

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