關於「SQL index performance」標籤，搜尋引擎有相關的訊息討論：

sql - Can Indices actually decrease SELECT performance?stackoverflow.com › questions › can-indices-actually-decr...How to use SQL Server Indexes for performance tuningenlabsoftware.com › database › how-to-use-sql-server-inde...Indexing Strategy for the query performance - DBA S