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Window Functions in MS SQL Server

Introduction
The Final Quiz
10. Question 7
You’ve Completed the Windows Function Course!

Instruction

Perfect again! Question 7 is next.

Exercise

For each treatment, show the following information: Id, TreatmentDate, Name, Price, the Price of the previous treatment (in terms of the Id) and the difference between these two values. Name the last two columns LastTreatment and Difference.