Error 15023: User already exists in current database. I fix it with sp_change_users_login, using Report, Auto_Fix or Update_One to link the user to a login.
SQL Server emergency? Email pinal@sqlauthority.com with URGENT in the subject line.
Splitting Text on Several Delimiters With REGEXP_SPLIT_TO_TABLE
REGEXP_SPLIT_TO_TABLE handles several separators in SQL Server 2025. These examples keep source keys and ordinals while separating trimming from empty-token handling. A small edge-case set also shows where a regular expression is not a CSV parser.
SQL SERVER – Primary Key Constraints and Unique Key Constraints
Primary Key and Unique Key both enforce uniqueness, but they differ in the index they create and in NULL handling. Here are the differences and the scripts.
SQL SERVER – UDF – Function to Convert Text String to Title Case – Proper Case
My UDF udf_TitleCase converts any string to Title Case, also called Proper Case. The post has a sample call, its output and the full T-SQL code of the function.
SQL SERVER – ReIndexing Database Tables and Statistics with Targeted Maintenance
ReIndexing Database tables starts with a measured maintenance need. I check the workload before choosing an index operation.
SQL SERVER – Query Analyzer Short Cut to display the text of Stored Procedure
A quick Query Analyzer shortcut: map sp_helptext to a key, select any SP name and display the text of Stored Procedure right in the result window.
SQL SERVER – SQL Joke, SQL Humor, SQL Laugh
A short SQL joke I found on DavidM’s blog on SQLTeam: roll call at DBMS school, and MySQL rushes in late because it thought it was February 31st.
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