Backup and restore

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Scripting Makes Mistakes Easier Than Ever

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A major outage from Atlassian because of a bad script has Steve thinking about the challenges of recovering from mistakes. When we are making changes to portions of our data and we need to plan for mistakes to occur and ensure we can restore the data.

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2022-04-22

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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