Joyful Crafsmen is a young company designing, constructing and operating business intelligence solutions for enterprises. People behind are experts in Microsoft Data Platform, which includes SQL Server, Microsoft Azure, Power BI and other leading edge Microsoft technologies. Sharing our know-how with others is our other love. Through training, consulting, and teaching in our community, we help others to be better and better every day.

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Power BI Tracker

Znáte ten pocit, kdy jste si přepsali nějakou složitější measure a rádi byste jí vrátili do stavu, jak vypadala před hodinou? Nebo kolega něco upravil ve vašem modelu, ale...

2022-09-22 (first published: )

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Azure Synapse Case Study

Let’s introduce our customer and their product
Our client is working in telecommunications providing secure and reliable networks. They are an independent supplier of mobile, data and voice services in...

2022-06-29 (first published: )

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Blogs

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Adding new column with DEFAULT

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Question of the Day

Adding new column with DEFAULT

Which number will the COUNT() return after executing the following statements:

DROP TABLE IF EXISTS #test;
CREATE TABLE #test (id INT)
INSERT INTO #test (id)
SELECT *
  FROM GENERATE_SERIES(1, 3) AS gs
;

ALTER TABLE #test ADD flag BIT CONSTRAINT DF_#test_flag DEFAULT 0;
go
UPDATE #test SET flag = 0 WHERE id = 1
UPDATE #test SET flag = 1 WHERE id = 2

INSERT INTO #test (id) VALUES (4)

SELECT COUNT(*)
  FROM #test AS t
 WHERE flag = 0
 

See possible answers