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Technical Article

PASS 2009 Summit - Call for Speakers is Open

The call for speakers is open through midnight on April 10, 2009, so get busy submitting those abstracts! Work hard on the title and description, make it something that seems interesting and compelling for attendees. Expect the competition to be fierce...The call for speakers is open through midnight on April 10, 2009, so get busy submitting those abstracts! Work hard on the title and description, make it something that seems interesting and compelling for attendees. Expect the competition to be fierce...

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2009-03-24

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External Article

Finding the Causes of Poor Performance in SQL Server, Part 1

To tackle performance problems with applications, first use SQL Profiler to find the queries that constitute a typical workload: From the trace, spot the queries or stored procedures that are having the most impact. Then it's down to examining the execution plans and query statistics. You then see what effects you've had and maybe repeat the process. Gail explains all, in a two-part article.

2009-03-23

5,352 reads

Technical Article

Introducing New Features In The VSTS Database Edition GDR

In this article, we focus specifically on highlighting new features in the GDR, including its support for offline schema development, tools that support new processes that you can use when you develop a database schema, and features that support database administration.

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2009-03-20

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Question of the Day

Adding new column with DEFAULT II

Which number did the two COUNT(*) return: 

DROP TABLE IF EXISTS #tmp
CREATE TABLE #tmp (id INT NOT NULL)

INSERT INTO #tmp (id) 
SELECT gs.value
  FROM GENERATE_SERIES(1, 5) AS gs

ALTER TABLE #tmp ADD my_value INT NOT NULL CONSTRAINT df_tmp_my_value DEFAULT 1

SELECT COUNT(*)  FROM #tmp AS t WHERE my_value = 1

ALTER TABLE #tmp DROP CONSTRAINT df_tmp_my_value

ALTER TABLE #tmp ADD CONSTRAINT df_tmp_my_value DEFAULT 2 FOR my_value

SELECT COUNT(*)  FROM #tmp AS t WHERE my_value = 1

See possible answers