OVER clause is used in a query to determine the partitioning and ordering of a rowset before the associated window function is applied. That is, the
OVER clause defines a window or user-specified set of rows within a query result set. A window function then computes a value for each row in the window. You can use the
OVER clause with functions to compute aggregated values such as moving averages, cumulative aggregates, running totals, or a top N per group results.
OVER clause can be used with the following:
NEXT VALUE FOR function
Let’s first take a look at using ...