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.
Diese Übung ist Teil des Kurses
Cleaning Data in SQL Server Databases
Interaktive Übung
Versuche dich an dieser Übung, indem du diesen Beispielcode vervollständigst.
SELECT *,
-- Apply ROW_NUMBER()
___() ___ (
-- Write the partition
___ BY
___,
___,
___
ORDER BY
airport_code,
carrier_code,
registration_date
) row_num
FROM flight_statistics