Articles

SQLServerCentral Article

SQL Server Execution Plans

Every day, out in the SQL Server forums, the same questions come up again and again: why is this query running slow? Why isn't my index getting used? In order to arrive at the answer you have to ask the same return question in each case: have you looked at the execution plan? Grant Fritchey provides the only dedicated and detailed book on this essential topic.

2013-03-15

51,105 reads

SQLServerCentral Article

SQL Server Hardware

SQL Server Hardware will provide the fundamental knowledge and resources you need to make intelligent decisions about choice, and optimal installation and configuration, of SQL Server hardware, operating system and the SQL Server RDBMS.

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2013-03-15

15,286 reads

SQLServerCentral Article

SQL Server Stumpers, Vol.5

Whether practicing for an exam or interview, or just wanting to see who's got the biggest SQL Server brain in your office, this book is perfect. Containing 100 SQL Server Central Questions of the Day, this book is a great way to test yourself and increase your knowledge.

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2013-03-15

3,586 reads

SQLServerCentral Article

SQL Server XML Schemas

When information is exchanged in XML format, there needs to be an agreement between the sender and receiver about the structure and content of the XML document. An XSD (XML Schema Definition Language) Schema can be used to enforce this contract and validate the XML data being exchanged. Jacob Sebastian's book explains all.

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2013-03-15

5,451 reads

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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