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

Technical Article

Monitoring Availability Group Replica Synchronization

If you are deploying SQL Server Availability Groups, one of the important aspects of a successful deployment is monitoring the synchronization of the secondary replica databases with the primary replica - but there are multiple ways to do this. Jonathan Kehayias goes through each, explaining their different benefits and drawbacks.

★ ★ ★ ★ ★ ★ ★ ★ ★ ★

You rated this post out of 5. Change rating

2015-09-17

2,771 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

Blogs

Au Revoir for now

By

No, I’m not quitting or retiring. Just going on vacation, but I leave tonight...

Goodbye, Microsoft

By

A few years ago I took a new job at Microsoft, working as a...

The SUM of Nothing: #SQLNewBlogger

By

I caught this interesting item over on Pinal Dave’s blog: Eleven Interview Questions that...

Read the latest Blogs

Forums

Building a SQL Server Fleet Audit That Leadership Actually Reads

By Mayank Sethi

Comments posted to this topic are about the item Building a SQL Server Fleet...

Smart AI Agents and Data Security

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Smart AI Agents and Data...

RegEx Functions IV

By Steve Jones - SSC Editor

Comments posted to this topic are about the item RegEx Functions IV

Visit the forum

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