I can Remove Duplicate characters while preserving their first-occurrence order. This second method uses explicit positions and ordered aggregation.
SQL Server emergency? Email pinal@sqlauthority.com with URGENT in the subject line.
How to Insert Line Break in SQL Server String? – Interview Question of the Week #139
How do you insert a Line Break in a SQL Server string? Just press Enter inside the string, and switch SSMS results to text to see it. Here is how it works.
SQL SERVER – Unable to Get Listener Properties Using PowerShell – An Error Occurred Opening Resource
A client could not change listener properties with PowerShell and got “An error occurred opening resource”. Here is the T-SQL query I shared and what fixed it.
SQL SERVER – How to Find UNIQUE Key Columns? – sp_special_columns
Want to know which columns uniquely identify a row in a table? The system stored procedure sp_special_columns tells you. Here is a quick demo.
SQL SERVER – System Procedure to List Out Table From Linked Server
The System Procedure sp_tables_ex lists table metadata from an existing linked server. I check its provider and login mapping separately.
ROWCOUNT and PAGECOUNT: Faking a Big Table to Test Plans
You can tell the optimizer a three-row table has 10 million rows and watch the plan change. Here is how, and how to undo it.
SQL SERVER – Different Methods to Know COMPATIBILITY LEVEL of a Database
Different methods to find the compatibility level of a database, from sp_helpdb to sp_dbcmptlevel, with a quick note on what the setting means.
SQL Server slow? Let's fix it together in about four hours.
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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.

