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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
15. Exercise 1

Instruction

Exercise number 1, the easiest one!

Exercise

For departments with an ID of 1, 3, or 5, show each employees's first name, last name, YearsWorked, and the average number of YearsWorked in those three departments (as AvgYearsWorked).