DF037: The GROUP BY clause is used without an aggregate function.
The topic describes the DF037 T-SQL code analysis rule.
Category
BEST PRACTICE
Message
The GROUP BY clause is used without an aggregate function.
Description
Using the DISTINCT clause instead of the GROUP BY clause without an aggregate function may lead to better performance.
Noncompliant code example
SELECT CustomerId
FROM dbo.Customer
GROUP BY CustomerId
Compliant solution
SELECT DISTINCT CustomerId
FROM dbo.Customer
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