In the second part of the article we will talk about the functions themselves, which are used to form values. The window function calculates the value from a set of data associated with the current row, that is, data from the same group, if Partition by is used. Conventional aggregate functions for ...

Long time ago an interesting functionality appeared in Microsoft SQL Server 2005- window functions. These functions allow you to perform calculations in a given range of lines within a Select clause. For those who have not encountered these functions, the question arises - “What does window me...