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SQL Server Enum Implementation: A Single-Row View Strategy for Avoiding Magic Values

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Learn about an alternative strategy for avoiding hardcoded literal values in SQL Server queries by using single-row views designed to mimic enum behavior.

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2026-06-26

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2022-02-22 (first published: )

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Question of the Day

Getting the Average

I have this data in the dbo.Commission table in a SQL Server 2022 database.

salesperson commission
Brian       12
Brian       16
Andy        7
Andy        14
Andy        21
Steve       20
Steve       NULL
All the data is a varchar, and I decide to run this query to get the totals for each salesperson.
SELECT SalesPerson
     , AVG(TRY_PARSE(Commission AS int)) AS TotalCommission
 FROM commission
 GROUP BY SalesPerson
GO
What average commission is calculated for Steve?

See possible answers