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

164 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

543 reads

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Question of the Day

Fixing the Error

On SQL Server 2025, I have a database that has this collation: SQL_Latin1_General_CP1_CI_AS. I decide I want to run this code:

SELECT UNISTR('*3041*308A*304C*3068 and good night', '*') AS 'A Classic';
I get this error:Msg 9844, Level 16, State 4, Line 24 The char/varchar input type uses an unsupported collation. Only a UTF8 collation is supported with char/varchar input type in UNISTR function.What is the easiest way to fix this error?

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