Bert Wagner

Bert Wagner is a Business Intelligence Developer at Progressive Insurance. He enjoys solving challenging data transformations with T-SQL and optimizing for query performance. In addition to BI development, Bert loves building ASP.NET MVC web apps and building Internet of Things projects.

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Joining on NULLs

by Bert Wagner

Bert Wagner

Watch this week's video on YouTube
It's important to be aware of columns that allow NULL values since SQL Server may handle NULLs differently than you might expect.
Today I want...

2019-03-26

2 reads

Joining on NULLs

by Bert Wagner

Bert Wagner

Watch this week's video on YouTube
It's important to be aware of columns that allow NULL values since SQL Server may handle NULLs differently than you might expect.
Today I want...

2019-03-26

4 reads

4 Reasons To Avoid VARCHAR(8000)

by Bert Wagner

Bert Wagner

Watch this week's video on YouTube
When first learning SQL Server, I had the brilliant idea of defining every column on my table as VARCHAR(8000). After all, the VARCHAR datatype...

2019-03-19

1 reads

4 Reasons To Avoid VARCHAR(8000)

by Bert Wagner

Bert Wagner

Watch this week's video on YouTube
When first learning SQL Server, I had the brilliant idea of defining every column on my table as VARCHAR(8000). After all, the VARCHAR datatype...

2019-03-19

4 reads

Time Zones and Daylight Saving Time

by Bert Wagner

Bert Wagner

Watch this week’s episode on YouTubeAT TIME ZONE is great because it makes it easy to perform daylight saving time and...

2019-03-19 (first published: 2019-03-05)

8,913 reads

Dipping into the Cookie Jar

by Bert Wagner

Bert Wagner

This post is a response to this month's T-SQL Tuesday #112 prompt by Shane O'Neill. T-SQL Tuesday is a way for the SQL Server community to share ideas about different database and...

2019-03-12

Dipping into the Cookie Jar

by Bert Wagner

Bert Wagner

This post is a response to this month's T-SQL Tuesday #112 prompt by Shane O'Neill. T-SQL Tuesday is a way for the SQL Server community to share ideas about different database and...

2019-03-12

Gaps and Islands Across Date Ranges

by Bert Wagner

Bert Wagner

Watch this week’s episode on YouTube.In a traditional gaps and islands problem, the goal is to identify groups of continuous...

2019-03-12

4,462 reads

Gaps and Islands Across Date Ranges

by Bert Wagner

Bert Wagner

Watch this week's video on YouTube
In a traditional gaps and islands problem, the goal is to identify groups of continuous data sequences (islands) and groups of data where the...

2019-03-12

20 reads

Gaps and Islands Across Date Ranges

by Bert Wagner

Bert Wagner

Watch this week's video on YouTube
In a traditional gaps and islands problem, the goal is to identify groups of continuous data sequences (islands) and groups of data where the...

2019-03-12

1 reads

All authors

Bert Wagner

Joining on NULLs

Joining on NULLs

4 Reasons To Avoid VARCHAR(8000)

4 Reasons To Avoid VARCHAR(8000)

Time Zones and Daylight Saving Time

Dipping into the Cookie Jar

Dipping into the Cookie Jar

Gaps and Islands Across Date Ranges

Gaps and Islands Across Date Ranges

Gaps and Islands Across Date Ranges

Blogs

SQL Training Black Friday Deals

Dry-run xp_delete_file Before Actually Deleting Files?

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Which Object Definitions Are Available?

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T-SQL in SQL Server 2025: The PRODUCT Function

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Which Object Definitions Are Available?