Articles

External Article

How to Confuse the SQL Server Query Optimizer

Want to 'trick' SQL Server into performing millions of logical reads to return data, when only are few thousand were really required? In this article, Gail Shaw examines three common forms of generic SQL that can and will confuse the SQL Server Optimizer to the point that it generates and reuses very inefficient execution plans.

2015-09-21

3,875 reads

External Article

T-SQL Window Functions Speed Phreakery

Before SQL Server had SQL window functions, SQL Server developers had to use all manner of tricks and algorithms to come up with ways to rapidly process large amounts of data. Do we need these techniques now that we can express a SQL task in terms of window functions? Kathi revisits a famous SQL challenge to find out.

2015-09-18

4,213 reads

External Article

The Zen of Code Reviews: Best Practices

If you don't feel that you are getting helpful and comprehensive feedback from code reviews, it may well be your fault. Unless you are considerate to your reviewers in a number of ways, they might find it difficult to check your code and provide helpful advice. What ways? Michael Sorens outlines the eight golden rules that, if you follow them, might even even make your code a pleasure to review!

2015-09-15

6,927 reads

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Question of the Day

A Quick Restore

While doing some testing of an application, I wanted to reset my environment after doing some testing with this code:

USE DNRTest

BACKUP DATABASE DNRTest TO DISK = 'dnrtest.bak'
GO
/*
Bunch of stuff tested here
*/RESTORE DATABASE DNRTest FROM DISK = 'dnrtest.bak' WITH REPLACE
What happens if this runs, assuming the "bunch of stuff" isn't anything affecting the instance.

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