Christian lives in Guatemala. He has worked with Databases for about 12 years, at the beginning as a software developer and for the last 10 years as DBA. His expertise areas are Database migration, Performance tuning, Security of SQL Server and Designing and Implementing HA and DR environments. He has worked with SQL Server since version 2000. Passionate about SQL Server, Azure and joining to the Online SQL Server community. You can always find him on Twitter (@charaujo).

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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
 

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