Dustin Ryan is a Data Platform Solution Architect on the Education Specialist Team Unit at Microsoft. Dustin has worked in the business intelligence and data warehousing field since 2008, has spoken at community events such as Code Camp, SQL Saturday, SQL Rally, and PASS Summit, and has a wide range of experience using the Microsoft business intelligence stack of products across multiple industries. Prior to his time at Microsoft, Dustin worked as a business intelligence consultant and trainer for Pragmatic Works, a Microsoft partner. Dustin is also an author, contributor and technical editor of books such as Applied Microsoft Business Intelligence, Professional Microsoft SQL Server 2012 Analysis Services with MDX and DAX, and others. You can learn more about Dustin at http://SQLDusty.com.

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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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