Tim Mitchell

Tim Mitchell is a business intelligence consultant, author, and trainer. He has been building data solutions for over 20 years, and is a 13-time recipient of the Microsoft Data Platform MVP award (2010-2022). He is the founder and principal data architect at Tyleris Data Solutions.

Tim has spoken at international and local events including the SQL PASS Summit, SQLBits, SQL Connections, along with dozens of tech fests, code camps, and SQL Saturday events. He is the author of the book The SSIS Catalog: Install, Manage, Secure, and Monitor your Enterprise ETL Infrastructure, coauthor of the book SSIS Design Patterns, and is a contributing author on the charity book project MVP Deep Dives Vol 2.

You can visit his website and blog at TimMitchell.net or follow him on Bluesky at https://bsky.app/profile/tmitch.net.
  • Interests: SQL Server, Data Warehousing, ETL, Data Architecture, Python, Dbt

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Blog Post

Eight Words

I remember a lot of things about that day.  It was July in Texas, which is to say, it was...

2012-05-03 (first published: )

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Blogs

Troubleshooting SQL Server – Starting with the Error Log

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We’ve all been there. Someone walks up and asks, “Is SQL Server having issues?”...

From OLTP to Analytics: Bridging the Gap with Modern SQL Architectures

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In the beginning, there was OLTP – Online Transaction Processing. Fast, reliable, and ruthlessly...

Free Online Sessions – Building the €100 DWH and Indexing for Dummies

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I’m giving two online sessions soon on virtual events that are free to attend....

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Password Guidance

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Question of the Day

Using table variables in T-SQL

What happens if you run the following code in SQL Server 2022+? 

declare @t1 table (id int);

insert into @t1 (id) values (NULL), (1), (2), (3);

select count(*)
from @t1
where @t1.id is distinct from NULL;
 

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