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Get to know the data
Get to know the OVER() clause
Computations with OVER()
Aggregate functions with OVER()
Using OVER() with WHERE
15. Exercise 1


Exercise number 1, the easiest one!


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).