Blog135.9K views3,200 votes0 replies1,939 following
When a Columnstore Index Fixes Your Slow SQL Server Reports (and When It Won't)
Columnstore indexes can turn a 14-minute SQL Server aggregation into seconds — or make your OLTP table miserable. Here's how the storage model works, a worked CCI example, and the checks that tell you which side you're on.
microsoftsqlservercolumnstore-indexquery-performanceTasadduq Burneyowner30.8K rep · 20 Aug 2025, 16:03 UTC