Treating duplicates

In the previous exercise, you reviewed the concept of ROW_NUMBER(). In this exercise, you will use it in your code.

You want to select all the rows from the flight_statistics table that are duplicated. After that, you want to get all the rows without duplicates. You consider that the repeating group for this table is formed by the columns airport_code, carrier_code, and registration_date.

This exercise is part of the course

Cleaning Data in SQL Server Databases

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Hands-on interactive exercise

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

SELECT *,
	   -- Apply ROW_NUMBER()
       ___() ___ (
         	-- Write the partition
            ___ BY 
                ___, 
                ___, 
                ___
			ORDER BY 
                airport_code, 
                carrier_code, 
                registration_date
        ) row_num
FROM flight_statistics

Edit and Run Code