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May17

SQL SERVER – Disable Index – Enable Index – ALTER Index

Pinal Dave
SQL Performance
SQL Index, SQL Scripts, SQL Server DBCC
23 Comments

When DTS, BCP or BULK INSERT needs an index out of the way, I prefer to disable index with ALTER INDEX and enable it again with REBUILD. AdventureWorks example.

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May16

SQL SERVER – Fix : Error 1205 : Transaction (Process ID) was deadlocked on resources with another process and has been chosen as the deadlock victim. Rerun the transaction

Pinal Dave
SQL Performance
SQL Error Messages, SQL Scripts, SQL Server
94 Comments

Fix : Error 1205 : Transaction (Process ID) was deadlocked on resources with another process and has been chosen as the deadlock victim. Rerun the transaction.

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May16

SQL SERVER – Fix: Error 130: Cannot perform an aggregate function on an expression containing an aggregate or a subquery

Pinal Dave
SQL Tips and Tricks
SQL Error Messages, SQL Function, SQL Scripts, SQL Sub Query
31 Comments

Error 130 says you cannot perform an aggregate function on an expression containing an aggregate, like AVG(COUNT()). A derived table gets around it.

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May15

SQL SERVER – Binary Sequence Generator – Truth Table Generator

Pinal Dave
SQL Tips and Tricks
SQL Function, SQL Scripts, SQL Utility
1 Comment

A script that builds a 512 row truth table with its decimal value and binary sequence, using CROSS JOINs on a bit table. Add or remove joins to resize it.

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May15

SQL SERVER – DBCC commands List – documented and undocumented

Pinal Dave
SQL Tips and Tricks
SQL Server DBCC, Undocumented SQL
20 Comments

The full list of documented and undocumented DBCC commands with their syntax, plus how DBCC TRACEON(2520) and DBCC HELP show all of them in Query Analyzer.

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May14

SQL SERVER – SQL Joke, SQL Humor, SQL Laugh – Photo

Pinal Dave
SQL Tips and Tricks
SQL Humor
1 Comment

A little SQL laugh to brighten your day: a funny photo I found at Worse Than Failure. Read the last line of the ingredients list closely.

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May14

SQL SERVER – MS TechNet : Storage Top 10 Best Practices

Pinal Dave
SQL Tips and Tricks
Best Practices, SQL Data Storage, SQL Download, SQL Scripts
1 Comment

My pick of the Storage Top 10 Best Practices from MS TechNet: know your IO, keep designs simple, put logs on RAID 1+0, isolate logs from data and plan TEMPDB.

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Pinal Dave

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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.

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