A short query to delete duplicate records from a table with an identity column: keep the MAX(ID) in each group of duplicate columns and remove the rest.
WINDOW: Reuse an Explicit Running-Total Frame
WINDOW lets me name a window definition and reuse it across compatible calculations. I still specify the partition, ordering and frame. A short name should make the intended calculation easier to review.
Restore Database Backup Using T-SQL, Step by Step
To restore database backup files safely, read the backup first, then restore under a name and paths you choose. This post builds a small demo database, backs it up, and restores it with MOVE and REPLACE. It also explains the errors that stop most restores.
TRANSLATE: Map Characters Simultaneously Instead of Cascading Replacements
TRANSLATE maps each input character once, which matters when replacement characters also appear in the search list. Nested REPLACE calls can process earlier replacements again. I compare both results before choosing a cleanup expression.
Showing Comma-Separated Role Members for Every Database Role
Comma-separated role members make direct assignments easier to review. The queries retain empty roles and label public membership as implicit. Keep the underlying rows because nested roles and directory groups need a separate effective-access review.
SQL SERVER – FIX : Error 15023: User already exists in current database.
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.
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.