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.

Blog Post

IN vs UNION ALL

Watch this week’s episode on YouTube. When you need to filter query results on multiple values, you probably use an IN() statement or multiple predicates separated by ORs: or...

2019-05-13 (first published: )

1,320 reads

Blog Post

Correlated Subqueries vs Derived Tables

Correlated subqueries provide an intuitive syntax for writing queries that return related data. However, they often perform poorly due to needing to execute once for every value they join on....

2019-05-07 (first published: )

1,720 reads

Blog Post

Temporary Staging Tables

Watch this week's video on YouTube
SQL Server Spool operators are a mixed bag. On one hand, they can negatively impact performance when writing data to disk in tempdb. On...

2019-05-07

7 reads

Blog Post

Temporary Staging Tables

Watch this week’s episode on YouTube. SQL Server Spool operators are a mixed bag. On one hand, they can negatively impact performance when writing data to disk in tempdb....

2019-05-07

238 reads

Blog Post

Temporary Staging Tables

Watch this week's video on YouTube
SQL Server Spool operators are a mixed bag. On one hand, they can negatively impact performance when writing data to disk in tempdb. On...

2019-05-07

7 reads

Blog Post

IN vs UNION ALL

Watch this week's video on YouTube
When you need to filter query results on multiple values, you probably use an IN() statement or multiple predicates separated by ORs:
WHERE Col1 IN...

2019-04-30

14 reads

Blog Post

IN vs UNION ALL

Watch this week's video on YouTube
When you need to filter query results on multiple values, you probably use an IN() statement or multiple predicates separated by ORs:
WHERE Col1 IN...

2019-04-30

5 reads

Blog Post

Window Functions vs GROUP BYs

There are many options available for improving the performance of a query: indexes, statistics, configuration settings, etc… However, not all environments allow you to use those features (eg. vendor...

2019-04-25 (first published: )

1,245 reads

Blogs

Setting FK Constraints in Data Modeler

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One of the things a customer asked recently about Redgate Data Modeler was how...

Webinar: Navigating the Database Landscape in 2026

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Claude AI Convinced Me Not to Build an iPad App

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I coach volleyball and I do a lot of stat stuff on paper. I...

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Forums

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Hi all, I've just had to roll back my SSMS 22 version from 22.3.0,...

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Hi! I've been banging my head against the wall for 2 days now trying...

The Power of Data and Privacy

By Steve Jones - SSC Editor

Comments posted to this topic are about the item The Power of Data and...

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Question of the Day

What's the Date?

In SQL Server 2025, there is a new function that returns the current date without the time. What is it?

See possible answers