Filtered Indexes: The Developer’s Secret Weapon in SQL Server
Learn about filtered indexes in SQL Server, how they work, and how they can help improve performance.
2025-11-24
4,468 reads
Filtered Index
A Rolling Filtered Index in SQL Server
I recently resolved an issue where a query pulling data from the last 30 days would time out due to the table’s size and the lack of a supporting index. Creating a supporting index is possible, but not ideal; it will be very large and may not be useful for most queries and use cases. I wonder how I could implement a filtered index that follows time and is always limited to the last n days.
2025-09-10
Prevent Duplicate Records in SQL using Filtered Index
In this article, I share how an SQL Server filtered index solved the problem of preventing duplicates for new rows in a table.
2024-07-03
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Question of the Day
How Long is a Long I/O?
In SQL Server 2025, a long I/O is recorded in the error log with message 833. How long much an I/O request be outstanding before this message is written to the log?
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