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

ETL Logging

If you were to poll data professionals on which tasks they enjoy working on the most, ETL logging would probably...

2016-03-22 (first published: )

2,402 reads

Blog Post

Technical Dogma

Humans are creatures of habit, and I suspect that engineering/technical types are even more so. We find something that works...

2016-01-04

452 reads

Blog Post

The Discomfort Zone

Over the Thanksgiving holiday, I read a book entitled The Phoenix Project. This book has been in my Kindle library...

2015-12-04 (first published: )

1,530 reads

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Blogs

Learn about Modern Microsoft Apps in San Diego

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How To Deploy Fabric SQL and Azure SQL Databases with Azure DevOps

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Question of the Day

BIT_COUNT II

In SQL Server 2025, I have a table (dbo.UserPermission) that contains this data: 

UserID  UserPermissions
15
23
37
4       NULL
What is returned when I run this code: 
select bit_count(UserPermissions) as PermissionCount
from dbo.UserPermission
where UserID = 4;

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