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Calculating mode (I)

Unfortunately, there is no function to calculate the mode, the most recurring value in a column. To calculate the mode:

  • First, create a CTE containing an ordered count of values using ROW_NUMBER()
  • Write a query using the CTE to pick the value with the highest row number

In this exercise, you will write the CTE needed to calculate the mode of OrderPrice.

This exercise is part of the course

Intermediate SQL Server

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Exercise instructions

  • Create a CTE ModePrice that returns two columns (OrderPrice and UnitPriceFrequency).
  • Write a query that returns all rows in this CTE.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

-- Create a CTE Called ModePrice which contains two columns
___ ___ (___, ___)
___
(
	SELECT OrderPrice, 
	ROW_NUMBER() 
	OVER(PARTITION BY OrderPrice ORDER BY OrderPrice) AS UnitPriceFrequency
	FROM Orders 
)

-- Select everything from the CTE
___
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