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: )

1,349 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: )

1,769 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

15 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

266 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

22 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

61 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

16 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: )

1,293 reads

Blogs

A New Word: Semaphorism

By

semaphorism – n. a conversational hint that you have something personal to say on...

SQL Server Linux Container Images Got Smaller: Image Size and Startup Time Across Cumulative Updates

By

This week I was at PASS Data Community Summit in Seattle, and I attended...

Using AI to Build Semantic Models, Ontologies, and Fabric Data Agents

By

(This is the third post in a three-part series on how AI is changing...

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Forums

Pay for Performance

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Pay for Performance, which is...

Helping an English Student with R

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Helping an English Student with...

Adding Bits I

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Adding Bits I

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Question of the Day

Adding Bits I

I have a table, dbo.bittest, where I am testing an application response. This has this structure:

CREATE TABLE [dbo].[BitTest]
(
[insertdate] [datetime] NULL CONSTRAINT [DF__BitTest__insertd__300F11AC] DEFAULT (getdate()),
[a] [bit] NULL
) ON [PRIMARY]
GO
My application runs this code:
INSERT dbo.BitTest
(
    insertdate,
    a
)
VALUES
(DEFAULT, 'true')
GO

See possible answers