Patrick

Patrick Keisler is a Senior CSA - Engineering for Microsoft with over 20 years of SQL Server experience working in various fields such as financial, healthcare, and government. You can follow him on Twitter or listen to him speak at various SQL Saturdays and user group meetings.

Blog Post

How to Convert FileTime to DateTime

One of my customers recently wanted to rename each of the SQL audit files will the datetime stamp of when it was created. I explained to them the filename...

2025-01-15 (first published: )

635 reads

Blog Post

Trace Flag 3625 Follow Up

Several months ago, I discussed my customer’s intention to enable trace flag 3625. Since that time, we have observed an intriguing phenomenon when encountering a login failure. To demonstrate...

2024-12-13 (first published: )

557 reads

Blog Post

How to Test Trace Flag 3625

Recently, one of my customers considered enabling Trace Flag 3625 on one of their SQL Servers, but they wanted a way to quickly test its functionality beforehand. For those...

2023-12-22 (first published: )

555 reads

Blogs

Goodbye, Microsoft

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A few years ago I took a new job at Microsoft, working as a...

The SUM of Nothing: #SQLNewBlogger

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I caught this interesting item over on Pinal Dave’s blog: Eleven Interview Questions that...

How to Move the SSMS Status Bar to the Top and Color-Code SQL Server Connections

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I use color-coded connections in SSMS to distinguish Production, Pre-Production, UAT, and Development. But...

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Question of the Day

Finding Trailing Spaces

I have some data in a SQL Server 2025 database. It looks like this for the dbo.Customer table:

CustomerID CustomerName PreferredName
1          Steve        Steve               
2          Andy         Andy               
3          Brian        Brian               
4          Allan        Allan               
5          Devin        Devin               
6          Steve        Steve               
7          Sally        Sally
I want to detect which names have a single trailing space. The CustomerName is a varchar() and the PreferredName is a CHAR(). Does this query detect the problem rows?
SELECT 
       CustomerID,
       CustomerName,
       PreferredName
FROM Customer
WHERE CustomerName <> RTRIM(CustomerName)
OR PreferredName <> RTRIM(PreferredName);

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