Check for empty string in SELECT statement - SQL

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In this post, I describe how to check for empty string in the SELECT statement in SQL.

Screenshot of a SELECT statement in SQL which checks for an empty string

Resolution

To check for an empty string in the SELECT statement in SQL, use ISNULL and NULLIF:

SELECT ISNULL(NULLIF(s.[Name], ''), 'None') [Name]
FROM [Sales].[Store] s

In this example. if the Store Name is empty, NULLIF will return null.

If NULLIF returns null, ISNULL will show the value 'None'.

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