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what is a "window descriptor" in tsql window function

user5251 Published in September 19, 2018, 11:02 am

I'm currently learning tsql window function by following the book tsql fundamental by Ben Itzik.

In the section that explain what a window is in terms of window function, the author used the term window descriptor

Could someone please explain to me what window descriptor means and represents?

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    the window descriptor is basically the window function that you are going to use to evaluate the row to achieve what you want – maSTAShuFu Apr 16 at 1:58

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