An introduction to the concept of windowing
SQL Server 2012 (formerly code-named SQL Server Denali) introduces several important T-SQL programmability features; this article focuses on one of those features-window functions. SQL Server 2005 was the first milestone in supporting window functions; it introduced window ranking functions (ROW_NUMBER, RANK, DENSE_RANK, and NTILE), as well as limited support for window aggregate functions-only with a window partition clause. SQL Server 2012 enhances support for window aggregate ...
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