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Window Functions in MS SQL Server

Get to know the data
Get to know the OVER() clause
Computations with OVER()
Aggregate functions with OVER()
Using OVER() with WHERE
Summary
14. Summary

Instruction

Great! Let's review what we've learned so far.

  • Use <WindowFunction> OVER() to perform an aggregate computation for all the rows in the query result.
  • Window functions can compute aggregates and keep the details of individual rows at the same time.
  • Window functions are applied after the rows are filtered by WHERE, therefore you cannot use window functions in the WHERE clause.

Did you grasp the basic idea of OVER()? Let's find out!

Exercise

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