Andy Warren

I started my SQL journey here at SQLServerCentral as one of the founders, helping to build a place to share and learn that continues to thrive under the editorial guidance of my friend Steve Jones. I've done a lot of volunteer work over the years ranging from our local SQL group (oPASS, SQLOrlando) to serving on the Board of Directors of PASS to designing and building the framework of SQLSaturday (which has gone on to produce more than 1000 locally managed events since we started in 2007). These days I manage a DBA team, but over the years I've been a trainer, consultant, contractor, and DBA. I'm rarely present on social media, the best way to contact me is here, LinkedIn, or via email.

SQLServerCentral Article

A Pattern Based Approach to Masking Errors

A few years ago I had a requirement to allow both developers and customers to see rows from a table used to store error information while making sure that any PII, PCI or similar sensitive data was not displayed. The tolerance for “oops” was low! This article presents one way to solve the challenge by […]

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2020-04-27

1,763 reads

SQLServerCentral Article

Worst Practices - Objects Not Owned by DBO

Last week Andy launched a new series about Worst Practices by talking about why the Hungarian naming convention is bad for column names. This week he's at it again, declaring that the practice of having objects owned by anyone other than dbo is BAD! Agree or disagree, we think you'll enjoy reading this article and adding your thoughts to the discussion!

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2019-08-01 (first published: )

38,418 reads

SQLServerCentral Article

Error Logging Gone Wild

Many of have applications that log errors to a table. Ever thought about what happens when an application starts to throw a lot of errors? This article looks at the problem and some of the responses you might consider having ready in case it happens to you!

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2016-10-11

1,805 reads

Technical Article

Time to Rebrand

I became a SQL guy back in 1998 because the company that hired me used SQL Server. It’s been a good ride and it’s paid the bills, but after 15 years or so it’s time to do something different.

2015-04-01

6,297 reads

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Fixing the Error

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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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