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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.

Questo esercizio fa parte del corso

Intermediate SQL Server

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Istruzioni dell'esercizio

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

Esercizio pratico interattivo

Prova a risolvere questo esercizio completando il codice di esempio.

-- 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
___
Modifica ed esegui il codice