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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Blog Post

SQL Pi

A mildly humorous title, spawned by a link my friend Jon sent me about calculating Pi using a batch file....

2009-02-10

791 reads

Blog Post

PASS Update #4

Last week I posted Update #3 that discussed my first board meeting, but I didn't have time to cover my...

2009-02-05

406 reads

Technical Article

Ruthless Focus - A Different Type of Time Management Philosophy

If you could list all the reasons I work, the number one reason would be to support my family. My definition of support includes spending an appropriate amount of time with family, not just working to support it. I suspect most of you would agree with that as a goal.

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2009-02-04

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Adding new column with DEFAULT II

By Thomas Franz

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Advanced Deployment Scenarios: Stairway to Reliable Database Deployments Level 7

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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