geometry STDifference is directional. Two overlapping equal-area rectangles can produce equal remaining areas while retaining entirely different regions.
SQL Server emergency? Email pinal@sqlauthority.com with URGENT in the subject line.
SQL Tips – 5 SQL Server Best Practices
5 SQL Server Best Practices worth a quick check, starting with backing up the master database and testing it, and rebuilding indexes online to cut downtime.
SQL SERVER – Check Advanced Server Configuration
How do you Check Advanced Server Configuration values? Turn on show advanced options with sp_configure, run RECONFIGURE, then run sp_configure to list them.
SQLAuthority News – 2 Sessions at TechInsight 2010 – June 29 – July 1, 2010
I presented two sessions at TechInsight 2010 in Kuala Lumpur, Malaysia, from June 29 to July 1, 2010. The best part of the trip was the people and their response.
SQL SERVER – Computed Column – PERSISTED and Storage
How a computed column is created and why PERSISTED and storage go together: persisted columns take more space. Plus links to the whole series.
SQL SERVER – FIX: ERROR: 8170 Insufficient result space to convert uniqueidentifier value to char
Error 8170 says there is insufficient result space to convert a uniqueidentifier value to char. The simple fix is to give the VARCHAR its full 36 characters.
Inclusive End Dates: Why BETWEEN Misses the Last Day
Inclusive end dates describe whole calendar days, while BETWEEN compares the exact supplied endpoints. A date endpoint becomes midnight when compared with timestamp rows. A guarded disposable fixture makes the boundary conditions explicit.
SQL Server slow? Let's fix it together in about four hours.
In my Comprehensive Database Performance Health Check, you share your screen, I guide you, and we fix your biggest performance troublemakers. No passwords. No remote access.
You keep every script, and the know-how to fix it yourself next time.
Want your whole team to learn it?
My Practical Workshop has no PowerPoint, just live demos. My AI Enablement Workshop shows your team where AI saves hours, and where it quietly costs them.
Over 400 customers have worked with me this way, and not one shared a password. See all consulting options.
Who We Are
Pinal Dave is an SQL Server Performance Tuning Expert and independent consultant with over 24 years of hands-on experience. He holds a Masters of Science degree and numerous database certifications.
Pinal has authored 19 books and 125 Pluralsight courses. To freely share his knowledge and help others build their expertise, Pinal has also written more than 5,800 database tech articles on his blog at https://blog.sqlauthority.com.
Pinal is also a CrossFit Level 1 Trainer (CF-L1) and CrossFit Level 2 Trainer (CF-L2).
Nupur Dave is a social media enthusiast and an independent consultant. She primarily focuses on the database domain, helping clients build short and long-term multi-channel campaigns to drive leads for their sales pipeline.
Shaivi Pinalkumar Dave is a book author and a women’s artistic gymnast.

