software development

External Article

Working around schema drift in SQL Server

  • Article

At Stack Overflow, our environment has multiple implementations of a largely – but not 100% – identical schema. (By “schema,” I mostly mean the set of tables within a database.) I sometimes need to retrieve or update data across a large number of sites. Let’s say, pulling or removing information from the Users table, and related tables, across all of our databases.

2023-09-01

SQLServerCentral Editorial

We're Not Faster with AI

  • Editorial

At Redgate Software, we've been trialing Copilot from GitHub with our developers. I managed to get access for this experiment and have tried a few things, though I'm not sure I've found it very useful. I'll continue to work with Copilot, but for now, I just don't find Copilot AI helping me with the types […]

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2023-07-31

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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