T-SQL

External Article

How to Avoid Conditional JOINs in T-SQL

  • Article

Relational databases go out of their way to execute SQL, however bad the crimes against Codd and relational theory within the query might be. The 'conditional join' can be executed, but at great cost. As always, it is much better to sit back and restate the problem in a set-based way - Dwain Camps explains.

2015-10-02

7,474 reads

External Article

T-SQL Window Functions Speed Phreakery

  • Article

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

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Question of the Day

The String Distance I

In SQL Server 2025, what is returned by this code:

SELECT EDIT_DISTANCE('Steve', 'Stan')
Assume preview features are enabled.

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