Joseph Gama


Technical Article

Find a string in Procedures, Triggers, etc

I want to thank James Travis for his original and excellent work and to Razvan Socol for alerting about a similar problem that led me to improve James' code. The problem is that when searching for a word that is split between two 8kb blocks, James' code would ignore it. The solution is to look […]

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2004-02-21

172 reads

Technical Article

UDF Luhn's formula-credit card number validation

This UDF will validate a credit card number using Luhn's formula.For example 49927398716 will return 1:print dbo.luhn('49927398716')print dbo.luhn(49927398716)11based on:Credit cards, validation and the Luhn formulabyEduardo Chaveshttp://www.webdevelopersjournal.com/articles/validation.htmlAlgorithm converted to TSQL by Joseph Gama

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2002-12-12

549 reads

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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