May 2026 Discount: Comprehensive Database Performance Health Check | Testimonials

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Apr24

SQL SERVER – How to ALTER CONSTRAINT

Pinal Dave
SQL, SQL Server, SQL Tips and Tricks
SQL Constraint and Keys, SQL Scripts
13 Comments
After reading my earlier blog post SQL SERVER – Prevent Constraint to Allow NULL. I recently received question from user regarding how to alter the constraint. No. We cannot alter the constraint, only thing we can do is drop and recreate it. Here is the CREATE and DROP script. CREATE…
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Apr23

SQL SERVER – How to Use Decode in SQL Server?

Pinal Dave
SQL Tips and Tricks
SQL Function, SQL Scripts, SQL Server
16 Comments

One of the reader of the blog has sent me question regarding how to use DECODE function in SQL Server.

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Apr22

SQL SERVER – Potential Bottlenecks for Performance

Pinal Dave
SQL, SQL Server, SQL Tips and Tricks
12 Comments
In recent GIDS presentation, I was asked can I name potential bottlenecks for performance. I was taken back to my collage life with this question. I remember that I have memorized following names as potential bottlenecks. CPU RAM Hard Disk Network Application Code Today when I look back at this,…
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Apr21

SQL SERVER – Prevent Constraint to Allow NULL

Pinal Dave
SQL, SQL Server, SQL Tips and Tricks
SQL Constraint and Keys, SQL Scripts
7 Comments
With naked eyes, we often spot the evident problems but the specific details are missed many a time. Something similar happened recently. One of the blog readers sent me an email asking about a bug in how CHECK CONSTRAINT works. He suggested that check constraint accepts NULL even though the…
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Apr20

SQLAuthority News – Last 5 Days to WIN Windows Phone 7 – 140 Words to Win

Pinal Dave
SQL, SQL Server, SQL Tips and Tricks, SQLAuthority News
4 Comments
You can win Windows 7 Phone by writing only 140 Characters. You need to leave a comment over here: SQLAuthority News – Win Windows Phone from Idera in 140 Characters – A Cartoon Challenge of SQL over here. There are so far around 150 comments and I believe that chances of…
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Apr19

SQLAuthority News – Sudden Death of SSD on my Laptop – A Warning for SSD Users

Pinal Dave
Personal, SQL, SQL Server, SQL Tips and Tricks, SQLAuthority News
28 Comments
The solid state drive on my personal laptop just died. Here’s the story. I have a DELL XPS laptop which is now 2.5 years old. The laptop had demonstrated no issues. About 6 months ago, I decided to upgrade the hard drive to solid state drive. There was a lot…
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Apr18

SQL SERVER – Speaking on T-SQL Worst Practices at Great Indian Developer Summit 2011 – Bangalore

Pinal Dave
SQL, SQL Server, SQL Tips and Tricks
SQL Scripts
10 Comments
Presenting in front of techies is always fun. I will be speaking at Great Indian Developer Summit 2011 – Bangalore on April 19, 2011. Here is the details of my session: Session Title:“What did I do?” – T-SQL Worst Practices “Oh My God! What did I do?” Chances are you…
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SQL Server Management Studio (SSMS) - Unable to Connect to SSIS - The Specified Service Does Not Exist as an Installed Service alphabets-800x800

How to Allow Only Alphabets in Column? – Interview Question #136

SQL Server Management Studio (SSMS) - Unable to Connect to SSIS - The Specified Service Does Not Exist as an Installed Service objectexplorer

SQL Server Management Studio – New Feature – Object Explorer Query Tracking

SQL Server Management Studio (SSMS) - Unable to Connect to SSIS - The Specified Service Does Not Exist as an Installed Service rgcommunityhug

SQL Authority News – Community Hub by Redgate

SQL Server Management Studio (SSMS) - Unable to Connect to SSIS - The Specified Service Does Not Exist as an Installed Service DATEDIFF_BIG-800x164

SQL SERVER – Learning DATEDIFF_BIG Function in SQL Server 2016

SQL Server Management Studio (SSMS) - Unable to Connect to SSIS - The Specified Service Does Not Exist as an Installed Service zero

SQL SERVER – Puzzle – Write a Shortest Code to Produce Zero

SQL Server Management Studio (SSMS) - Unable to Connect to SSIS - The Specified Service Does Not Exist as an Installed Service scom-spn-01

SCOM – Alert: SQL Server Cannot Authenticate Using Kerberos Because the Service Principal Name (SPN) is Missing, Misplaced, or Duplicated

SQL Server Management Studio (SSMS) - Unable to Connect to SSIS - The Specified Service Does Not Exist as an Installed Service ssms17-ssis-01

SQL Server Management Studio (SSMS) – Unable to Connect to SSIS – The Specified Service Does Not Exist as an Installed Service

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Pinal Dave is an SQL Server Performance Tuning Expert and independent consultant with over 22 years of hands-on experience. He holds a Masters of Science degree and numerous database certifications.

Pinal has authored 14 SQL Server database books and 104 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 an experienced and dedicated professional with a deep commitment to flawless customer service. If you need help with any SQL Server Performance Tuning Issues, please feel free to reach out at pinal@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.


Comprehensive Database Performance Health Check

Is your SQL Server running slow and you want to speed it up without sharing server credentials? In my Comprehensive Database Performance Health Check, we can work together remotely and resolve your biggest performance troublemakers in less than 4 hours.

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Have you ever opened any PowerPoint deck when you face SQL Server Performance Tuning emergencies? SQL Server Performance Tuning Practical Workshop is my MOST popular training with no PowerPoint presentations and 100% practical demonstrations.

Essentially I share my business secrets to optimize SQL Server performance.


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