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

Gone Dark

This afternoon was quite interesting around the office.  A strong thunderstorm moved through the area, a common occurrence in Texas...

2009-03-25

1,399 reads

Technical Article

Building Reports, 2.0 Style

I’m getting my first taste of the new SQL Report Builder 2.0, and so far I’m enjoying the upgrade. Report Builder 2.0 is a standalone product, shipped as separate download from the SQL Server and Visual Studio suites. It allows users to develop and run reports locally, in addition to permitting the publication of these reports to SQL Server Reporting Services.

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2009-03-10

5,694 reads

Technical Article

Finding a Work-Life Balance

Like most everyone who works hard in our industry, I’ve run into more than a few conflicts trying to balance work and life. Personally, the further I progress in my career, the blurrier the lines become between work time, family/me time, and just plain lazy downtime. It’s quite easy to say that you’re going to spend X hours at work, and the rest of the time is mine, but the reality is ...

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2009-03-06

1,308 reads

Technical Article

Things I Wish I Had Known

I was tagged by Grant Fritchey (aka Scary DBA) in the latest get-to-know-you question. This one asks, “What do you wish you had known when you started?” I could go on for hours about the things I wish I hadn’t had to learn the hard way, but..

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2009-02-16

2,038 reads

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Blogs

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Following on from my last post about Getting Started With KubeVirt & SQL Server,...

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Forums

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data type gets lost in data flow

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Question of the Day

The Read Committed Snapshot Isolation behaviour

I am currently working with Sql Server 2022 and AdventureWorks database. First of all, let's set the "Read Committed Snapshot" to ON: 

use master;
go

alter database AdventureWorks set read_committed_snapshot on with no_wait;
go
Then, from Session 1, I execute the following code: 
--Session 1
use AdventureWorks;
go

create table ##t1 (id int, f1 varchar(10));
go

insert into ##t1 values (1, 'A');
From another session, called Session 2, I open a transaction and execute the following update: 
--Session 2
use AdventureWorks;
go

begin tran;
update ##t1 
set f1 = 'B'
where id = 1;
Now, going back to Session 1, what happens if I execute this statement? 
--Session 1
select f1
from ##t1
where id = 1;
 

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