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

Why Before How

I’ve spent a lot of time browsing and participating in online technical forums. In my early years in the industry...

2017-03-28 (first published: )

1,890 reads

Blog Post

Managing Bad Data

In the last post in my ongoing series about ETL best practices, I discussed the importance of error handling in ETL...

2017-02-21 (first published: )

2,206 reads

Blog Post

What is ETL?

In my ongoing series on ETL Best Practices, I am illustrating a collection of extract-transform-load design patterns that have proven...

2017-01-16 (first published: )

2,516 reads

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Blogs

Learn about Modern Microsoft Apps in San Diego

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I wrote about learning today for the editorial: I Can’t Make You Learn. I...

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

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Fabric has CI/CD built in, but if you've tried to use it for database...

A New Word: Attriage

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attriage – n. the state of having lost all control over how you feel...

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Forums

SSRS Reminded Me of the Time Microsoft Retired TMG

By Marko Coha

Comments posted to this topic are about the item SSRS Reminded Me of the...

Getting results from a Procedure to join to a query

By bswhipp

I have a need to execute a stored procedure and return the results to...

Upgrade 2016 Standard to 2022 Express

By pdanes

Title pretty much says it all - can this be done? I've tried several...

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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;

See possible answers