techanicinfotech

Techanic Infotech is a versatile software development company renowned for its comprehensive service offerings. Specializing in web development, mobile app development, digital marketing, and custom software solutions, the company leverages modern technologies and agile methodologies to deliver top-notch products that align closely with client needs. With a strong emphasis on quality and client satisfaction, Techanic Infotech serves a wide array of industries including healthcare, finance, e-commerce, and education. Their solutions are tailored to address specific business challenges, showcasing their adaptability and expertise in crafting innovative software solutions. Backed by a team of seasoned developers, Techanic Infotech positions itself as a dependable partner for businesses seeking cutting-edge software development solutions. Their commitment to delivering value-driven outcomes underscores their reputation as a reliable and forward-thinking industry player.
  • Skills: mobile app development company

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Adding new column with DEFAULT II

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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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