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Removing missing values

It is common to find missing values in your data. SQL Server represents missing values with NULL.

IS NULL and IS NOT NULL enable you to select or remove the rows where missing values are represented by NULL.

The airport_city column of the airports table has some NULL values. Try to find them!

This exercise is part of the course

Cleaning Data in SQL Server Databases

View Course

Hands-on interactive exercise

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

SELECT *
-- Select the appropriate table
FROM ___
-- Exclude the rows where airport_city is NULL
WHERE ___ ___ ___ ___
Edit and Run Code