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Kalen Delaney

Kalen Delaney has been working with SQL Server for 23 years and provides SQL Server training and consulting to clients around the world. Her most recent book is SQL Server 2008 Internals (Microsoft Press).

Email: kalen@sqlserverinternals.com

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Author Articles

Small Code Changes, Big SQL Server Performance Improvements

By Kalen Delaney, 01/19/2012

Learn how you can replace a scalar-valued user-defined functions (UDFs) call with actual code to greatly improve SQL Server performance.

Take a Hint About Query Hints

By Kalen Delaney, 12/29/2011

Kalen discusses two reasons she finds SQL Server query hints to be fascinating.

What Do You Want to Know About SQL Server 2012?

By Kalen Delaney, 11/17/2011

Kalen Delaney asks which SQL Server 2012 features you want to learn about and how in-depth you'd like the coverage to be.

PASS Summit 2011 Highlights

By Kalen Delaney, 10/20/2011

A look back at PASS Summit 2011, including how the #sqlpass hashtag grew excitement for the event, how first time attendees felt about their first PASS Summit, differences between ...

The Pros and Cons of Parameter Sniffing

By Kalen Delaney, 09/15/2011

A look at the pros and cons of parameter sniffing, locked data, table scans, and query recompilation.

SQL Server Training: More Options Than Ever Before

By Kalen Delaney, 09/01/2011

Kalen Delaney explores SQL Server training options, including online training, in-person training, and hybrid approaches.

The New Kid in Town: SQL Server Denali

By Delaney, Kalen, 07/21/2011

Kalen explores SQL Server Denali's future name, installation process, and commands that have been deprecated.

Testing a Heavy Load: Simulating Multiple Concurrent Operations

By Kalen Delaney, 06/16/2011

It is necessary to test your database application performance with many concurrent operations to simulate multiuser environments. Here's some suggestions for how to do so.

Spring Cleaning with SQL Server Stored Procedures

By Kalen Delaney, 04/21/2011

While browsing SQL Server’s documentation recently, I found two stored procedures for removing ghost records: sp_clean_db_free_space and sp_clean_db_file_free_space.

Do You Need a SQL Server Query Hint?

By Kalen Delaney, 03/17/2011

Find out how query hints can benefit you in certain situations and how the hints affect SQL Server's built-in query optimizer.

Using Table Partitions to Archive Old Data in OLTP Environments

By Kalen Delaney, 02/10/2011

If you have a large OLTP database, it might make sense to move less frequently accessed data onto cheaper storage with less frequent backups. Learn how to use table partitions to ...

How Simple Is Logging?

By Kalen Delaney, 02/10/2011

A look at SQL Server's three recovery models (i.e., SIMPLE recovery, BULK_LOGGED recovery, and Full recovery) and how each of them logs data.

Welcome to (SQL Server) 2011

By Kalen Delaney, 01/13/2011

Measuring Expertise: The New SQL Server MCM Program

By Kalen Delaney, 12/09/2010

The revised Microsoft Certified Master (MCM) in SQL Server requirements offer more opportunities for SQL Server professionals to become MCM certified. But will the new exams ...

SQL Server Terms: What's in a Name?

By Kalen Delaney, 11/18/2010

When talking about relational databases, does it matter which terms you use to describe an object as long as the meaning is fully understood?

How Much Social Networking Is Too Much?

By Kalen Delaney, 10/21/2010

Kalen explores the best place to post technical information on social media networks.

Is Failure an Option?

By Kalen Delaney, 09/30/2010

Kalen explores whether a version of SQL Server can be considered a failure if its missing features that were supposed to be in it.

Disseminating SQL Server Information

By Kalen Delaney, 08/19/2010

How can we ensure that everyone can find the SQL Server information they need?

Why Learn About SQL Server Internals?

By Kalen Delaney, 07/28/2010

Should you learn SQL Server internals? If you're interested in how SQL Server really works, you should.

Do You Have a Free Saturday?

By Kalen Delaney, 06/17/2010

Kalen explores the popularity of attending and speaking at the SQL Saturday events.



White Papers

Get your Windows 7 deployment off to the right start by implementing PC lockdown. A locked-down environment is easier and cheaper to support since users are less likely to make unnecessary changes to the core system configuration - read more here!

Essential Guides

Is your iSCSI "lossy"? The reality is that most off-the-shelf Ethernet hardware deployed for iSCSI can lose packets, resulting in slow performance or application downtime. Learn how to assess your current iSCSI infrastructure and engineer an advanced iSCSI SAN infrastructure.

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What's the best way to keep your network safe from malware? In this web seminar, security expert Greg Shields suggests an alternative method to the traditional blacklisting approach that is common with anti-virus and anti-malware solutions.

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