DF185: ELSE NULL is used in CASE expression.

The topic describes the DF185 T-SQL code analysis rule.

Category

BEST PRACTICE

Message

ELSE NULL is used in CASE expression.

Description

It is recommended to omit the ELSE NULL statement in the CASE expression as it will still return NULL as default value.

Noncompliant code example

SELECT CASE WHEN Qty < 10 THEN 'Low' ELSE NULL END AS prt_level
FROM dbo.Storage
GO

Compliant solution

SELECT CASE WHEN Qty < 10 THEN 'Low' END AS prt_level
FROM dbo.Storage
GO