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.

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SQLServerCentral Article

Mirrored Backups

One very interesting new feature in SQL Server 2005 is the ability to run backups to multiple locations, ensuring you have a second copy of the backup file if your first one were to be corrupted. SQL Server expert Andy Warren takes a look at how this feature works and the implications of using it.

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2008-05-12 (first published: )

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SQLServerCentral Article

Worst Practices - Not Using Primary Keys and Clustered Indexes

Two weeks ago Andy started his wildly successful series on Worst Practices. This week he continues that series discussing why failing to use primary keys and clustered indexes are worst practices. Agree or disagree, read the article and join the discussion. One thing you'll have to admit, reading an article by Andy is a lot more interesting than reading Books Online!

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2008-05-09 (first published: )

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Question of the Day

Adding new column with DEFAULT II

Which number did the two COUNT(*) return: 

DROP TABLE IF EXISTS #tmp
CREATE TABLE #tmp (id INT NOT NULL)

INSERT INTO #tmp (id) 
SELECT gs.value
  FROM GENERATE_SERIES(1, 5) AS gs

ALTER TABLE #tmp ADD my_value INT NOT NULL CONSTRAINT df_tmp_my_value DEFAULT 1

SELECT COUNT(*)  FROM #tmp AS t WHERE my_value = 1

ALTER TABLE #tmp DROP CONSTRAINT df_tmp_my_value

ALTER TABLE #tmp ADD CONSTRAINT df_tmp_my_value DEFAULT 2 FOR my_value

SELECT COUNT(*)  FROM #tmp AS t WHERE my_value = 1

See possible answers