Paul Randal

Paul S. Randal (Paul@SQLskills.com, twitter @PaulRandal) is a world-renowned speaker, author, and instructor at SQLskills.com; he is also the CEO. He worked on the SQL Server Storage Engine team at Microsoft from 1999 to 2007, writing DBCC CHECKDB/repair for SQL Server 2005 and with responsibility for the entire Core Storage Engine during SQL Server 2008 development. Paul is an expert on disaster recovery, high availability, SQL Server internals, and database operations, and is a regular presenter at conferences worldwide. He owns and runs the company with his wife, Kimberly L. Tripp, and in their spare time they like to seek out odd-shaped bottom dwellers at remote dive sites around the world!
  • Interests: Doing anything with my wife, Kimberly Tripp: Sailing Scuba diving World travel Hiking Naval history Model building

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SQLServerCentral Article

The Perils of Running Database Repair

In a perfect world everyone has the right backups to be able to recover within the downtime and data-loss service level agreements when accidental data loss or corruption occurs. Unfortunately we don’t live in a perfect world and so many people find that they don’t have the backups they need to recover when faced with corruption.

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2012-06-25

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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