About Kalen Delaney


I have been working with SQL Server for over 29 years, starting with my employment with the Sybase Corporation in October 1987. The first chapter of the first two Inside SQL Server books that I worked on contained all kinds of juicy details about the beginning of SQL Server with Sybase, and the author of the book’s first edition, Ron Soukup, was very much involved in the original joint product. I was also there, in the other half of the arena! I was working in Sybase Technical Support when the first OS/2 SQL Server was set up in one of our labs. Those were the days…

I worked for Sybase as a Technical Support Analyst for two years, and then transferred to the Education Department. I taught all the Sybase courses, and was the specialist for the advanced course on Performance Tuning and Optimization.

In 1992 I became an independent trainer and consultant, after my family moved from the San Francisco Bay Area to the Beautiful Pacific Northwest. Since then, I have worked with both the Microsoft and Sybase companies to develop courses and to do internal training for their Technical Support staff. I was the Primary Subject Matter Expert (SME) for two Microsoft courses: 608: New Features of Microsoft SQL Server 6.5, and 665: SQL Server 6.5 Performance Tuning and Optimization. In 1998 I developed an internal course for Microsoft’s product support team, to help them learn the internals and new features of SQL Server 7 and I did something similar for SQL Server 2000. I delivered these courses for many years, to various Microsoft offices and partners around the country and around the world. Today, I have my own custom course on SQL Server 2012/2008/2005 Architecture, Internals and Query Tuning, which I teach both privately and publicly to clients around the world. Please check my schedule page to see when I am offering public training or speaking at conferences.

In 1993, Microsoft awarded me the MVP (Most Valuable Professional) designation for my participation in the public SQL Server help forums on Microsoft’s news server (msnews.microsoft.com). I am still a participant on the public forums, especially Microsoft’s public news server, answering many questions dealing with SQL Server internals and behavior.

I have been writing about SQL Server for over 20 years, in addition to courseware development. Prior to writing my first Inside SQL Server book I was a coauthor of SAMS’ SQL Server 6.5 Unleashed (Oct 96) and SQL Server in 21 Days (Feb 98), also from SAMS.

I wrote a regular monthly column on SQL Server Internals for Pinnacle Publishing’s SQL Server Professional Journal from October 95 to September 98. have written articles for Windows ITPro Magazine (formerly Windows Magazine), from Penton Media (windowsITPro.com) In mid-1998 I joined the editorial staff of Penton’s newest publication, SQL Server Magazine, which made its debut in February 99. You can get a list of all my articles for SQL Server Magazine here.

On numerous occasions I have been invited by Microsoft to present special internal training. I have spoken at Microsoft Technical Education Conference (TechEd), and worked in the SQL Server Lab at several conferences.

In early 1999 I was asked to participate in the original planning committee to form a non-profit, international SQL Server Users’ Group. Out of that planning committee, the Professional Association for SQL Server (PASS) was born. I served as the Director of Program Development for the first two years, and spoke at the inaugural conference in Chicago in September 1999. I have spoken at every PASS conference since that time, usually presenting both a pre-conference seminar and a regular conference session.

My academic background centers around UC Berkeley, where I earned a BA in Linguistics and a MS in Computer Science. My training/teaching career goes back to my graduate school days when I was a Teaching Assistant in the Computer Science 101 courses at Berkeley. I started teaching classes on my own during my last year of graduate school, and then I taught for four years at Mills College in Oakland, California. At Mills, I taught the entire range of undergraduate courses, except for compilers. I taught Assembly language, data structures and operating systems, in addition to the basic programming classes. I also developed and taught Mills’ first course in database management systems. I then left Mills to return to UC Berkeley as a Lecturer, and I taught full time at Berkeley until I joined Sybase and my life with SQL Server began.

6 thoughts on “About Kalen Delaney

    • Hi Travis

      There are many people answering questions on public help forums who know as much or more than me. Why don’t you post your question on one of the public forums and then everyone can benefit from the question and the answer!


  1. Don Wood

    Kalen, I just read your e-book, SQL Server Internals: In-Memory OLTP. This book is incredible. It provides just enough detail to get a good understanding of In-Memory OLTP but it’s not overwhelming. When I first got interested in In-Memory OLTP I had to search the internet finding bits and pieces of information. Even then, I didn’t find everything you offer in this book. I just had to compliment you on a job well done!

    Don Wood

      • Don Wood

        Your so welcome. I did see one thing I may have misinterpreted. Where you write: “The more rows are read, the greater the performance beneft until, by reading 10,000
        rows in a transaction, the improvement is greater than 20%” Benefit is misspelled. Should the 20% be 2000% or 20 times faster? Again, thank you so much for this book. I will most certainly buy your books in the future.


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