Blog Posts

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My Toolbox - SSMS

No matter how hard Azure Data Studio (ADS) is pushed by Microsoft, most DBAs still use SQL Server Management Studio (SSMS). In this blog post, I’ll go through my...

2024-08-14 (first published: )

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Blog Post

Data (and Humans) At Rest

We talk a lot about data in the data world – imagine that! Sometimes, we talk about data at rest, but when do we all rest? Do we even...

2024-08-12 (first published: )

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Adding new column with DEFAULT II

By Thomas Franz

Comments posted to this topic are about the item Adding new column with DEFAULT...

Advanced Deployment Scenarios: Stairway to Reliable Database Deployments Level 7

By Massimo Preitano

Comments posted to this topic are about the item Advanced Deployment Scenarios: Stairway to...

You Need a DBA Pipeline

By Steve Jones - SSC Editor

Comments posted to this topic are about the item You Need a DBA Pipeline

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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