Performance Tuning

External Article

Lengthy SQL Server Queries Will Consume Your CPU

  • Article

The SQL (Structured Query Language) language is a declarative language that became the "Data Language" used for describing "what I need" and "where to fetch it from" in most organizations. OOP (Object Oriented Programming) languages became the most common practice among developers widely adopted by R&D organizations around the world. So how do we bridge the gap?

2008-05-23

3,819 reads

External Article

Execution Plan Basics

  • Article

Every day, out in the various discussion boards devoted to Microsoft SQL Server, the same types of questions come up again and again: Why is this query running slow? Is my index getting used? 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? We are very pleased to be allowed to publish the first chapter of Grant Fritchey's excellent new book on execution plans.

2008-05-22

4,960 reads

Technical Article

Measure TSQL Statement Performance

  • Article

Every developer needs to ensure that each TSQL statement is optimized. This article will give you a few different ideas on how to identify slow running queries and provide you with some tips on monitor your query performance while you make iterative changes to each query to try and improve performance.

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2008-01-22

4,005 reads

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RegEx Functions IV

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Question of the Day

RegEx Functions IV

I have this data in a table in a SQL Server 2025 database:

EmailAddressID EmailAddress
7              dylan0@ADVENTURE-WORKS.COM
8              Diane1@ADVENTURE-WORKS.COM
If I run this query, which row(s) are returned?
SELECT top 10
 *
 FROM person.EmailAddress
 WHERE REGEXP_LIKE(EmailAddress, '^D', 'i')
 AND BusinessEntityID IN (7,8)

See possible answers