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Implementation of Normalization in SQL Server

Introduction In my last article, Discussion on Normalization and Database Design Concepts, I discussed about the normalization concepts. Here, I will take one table in SQL Server and implement different normal forms. As we move up the higher normal forms, we end up on more number of tables. Implementation of Normal Forms Let us start […]

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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