Duplicate and overlapping indexes waste storage, slow down every write, and split optimizer statistics across redundant copies. This T-SQL script compares each non-heap index in the current database on its first sixteen key columns and surfaces any pair of indexes that overlap, giving the DBA a short list of cleanup …

Foreign keys enforce referential integrity, but SQL Server does not automatically create indexes on the referencing (child) columns. An unindexed foreign key column forces a full table scan every time a join or a DELETE on the parent table triggers a referential check. This script identifies all foreign key columns in …

This T-SQL query lists the rowstore indexes in the current database whose leaf level is fragmented and large enough to be worth maintaining, and returns a ready-to-review ALTER INDEX statement for each one. It reads sys.dm_db_index_physical_stats in SAMPLED mode and filters on avg_fragmentation_in_percent and …

Find Unused Nonclustered Indexes in SQL Server This script queries sys.dm_db_index_usage_stats to identify nonclustered indexes that have never been used by any read operation since the last SQL Server restart, yet still carry write overhead with every INSERT, UPDATE, and DELETE on the table. Purpose and Overview Every …