Windows Function in MySQL: The Ultimate Guide to Database Optimization | windows functions sql | V.1
In this video we'll learn how to use windows function.This is also called Analytical Function.
I Will explain the aggregate windows function with examples.
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A window function performs an aggregate-like operation on a set of query rows. However, whereas an aggregate operation groups query rows into a single result row, a window function produces a result for each query row: The row for which function evaluation occurs is called the current row.
But unlike regular aggregate functions, use of a window function does not cause rows to become grouped into a single output row - the rows retain their separate identities. Behind the scenes, the window function is able to access more than just the current row of the query result.
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This is is focussed on teaching how to write SQL queries using windows function by applying partition by on different dataset.
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