Book Reviews

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Book Review: Murach's SQL Server 2008 For Developers

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I received a review copy of Murach's SQL Server 2008 For Developers a couple months back and just finished up looking through it. In general I've always liked the style of the Murach books; short lessons that flow about as logically as you can do it when it often seems like you need to know it all to get anything done!

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2009-03-17

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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