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Apr14

SQL SERVER – Fix : Error: 18452 Login failed for user ‘(null)’. The user is not associated with a trusted SQL Server connection.

Pinal Dave
SQL Tips and Tricks
SQL Error Messages, SQL Scripts, SQL Server Security
196 Comments

Error: 18452 Login failed for user ‘(null)’ means the server only allows Windows Authentication. Switch to Mixed Mode and enable the sa login to fix it.

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Apr13

SQL SERVER – Stored Procedures Advantages and Best Advantage

Pinal Dave
SQL Performance
Best Practices, SQL Stored Procedure
43 Comments

My take on stored procedures advantages, and the best one of all: execution plan retention and reuse, since the rest can be had without them.

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Apr13

SQL SERVER – Script to Find SQL Server on Network

Pinal Dave
SQL Tips and Tricks
SQL Scripts, SQL Server Security, SQL Stored Procedure, SQL Utility
21 Comments

I manage lots of SQL Servers and forget their names, so I use xp_CMDShell and ISQL -L to find SQL Server on network machines. A short video is included.

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Apr13

SQL SERVER – 2005 – Disable Triggers – Drop Triggers

Pinal Dave
SQL Tips and Tricks
SQL Scripts, SQL Server Security, SQL Trigger
9 Comments

Two ways to stop a trigger from firing in SQL Server 2005: drop it or disable it. I prefer DISABLE TRIGGER and show the syntax to disable triggers.

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Apr12

SQL SERVER – Fix : Error 1702 CREATE TABLE failed because column in table exceeds the maximum of columns

Pinal Dave
SQL Tips and Tricks
Best Practices, SQL Error Messages, SQL Server DBCC
3 Comments

Error 1702, CREATE TABLE failed, happens when a table goes past the 1024 column limit in SQL Server 2000. The fix is to cut the columns to 1,024 or fewer.

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Apr12

SQL SERVER – Fix : Error: 3902, Severity: 16; State: 1 : The COMMIT TRANSACTION request has no corresponding BEGIN TRANSACTION.

Pinal Dave
SQL Tips and Tricks
SQL Error Messages, SQL Scripts, SQL Server Security, SQL Transactions
1 Comment

An SSIS package fails with Error 3902: the COMMIT TRANSACTION request has no corresponding BEGIN TRANSACTION. Two fixes, one is RetainSameConnection set to true.

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Apr12

Low Memory Signals in the Resource Monitor Ring Buffer

Pinal Dave
SQL Performance
SQL Cache, SQL DMV, SQL Memory, SQL Server
No Comments

Read the resource monitor ring buffer alongside Windows and process memory signals to investigate cache shrinkage in SQL Server.

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Pinal Dave

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.

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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 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.

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