A simple puzzle using UNION and UNION ALL: guess the output of two short scripts before you run them. The hint is my article on UNION vs. UNION ALL.
SQL Server emergency? Email pinal@sqlauthority.com with URGENT in the subject line.
SQL SERVER – 2005 – Mechanisms to Ensure Integrity and Consistency of Databases – Locking and Row Versioning
Books Online describes two mechanisms to ensure integrity and consistency of databases: locking and row versioning. Here is how it defines each one.
SQL SERVER – 2005 – Find Highest / Most Used Stored Procedure
Which stored procedure runs most often? My small SQL Server 2005 script finds the most used stored procedure, with execution count, worker time and calls per second.
SQL SERVER – Introduction to Live Lock – What is Live Lock?
What is Live Lock in SQL Server? How a write request can keep waiting behind a stream of reads, how it differs from a deadlock and how to reduce it.
SQLAuthority News – Book Review – Joe Celkos SQL Puzzles and Answers, Second Edition, Second Edition
My review of Joe Celko’s SQL Puzzles and Answers, Second Edition: 75 puzzles for SQL programmers with some experience, from quick ones to brain teasers.
SQL SERVER – Add Column With Default Column Constraint to Table
Add a NOT NULL column with a named default Column Constraint in one ALTER TABLE statement. I always name constraints instead of letting SQL Server pick one.
SQL SERVER – 2005 – Analysis Services Query Performance Top 10 Best Practices
Analysis Services Query Performance Top 10 Best Practices from TechNet: cube design, aggregations, partitions, efficient MDX, caching, memory and scaling out.
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 18 SQL Server database books and 120 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.

