shahzadkhan124

With five years of dedicated experience in SQL Server and database management, I specialize in crafting insightful articles that simplify complex SQL concepts for both beginners and seasoned professionals. My expertise spans database optimization, query tuning, and best practices in SQL development. Through my writing, I aim to empower readers to improve their SQL skills and stay updated with industry trends. Whether it’s in-depth tutorials or troubleshooting tips, I’m passionate about sharing knowledge to help the SQL Server community thrive.

Skills: Content writing

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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

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Question of the Day

Adding new column with DEFAULT II