Hi Friends
What is "index covering" of a query in SQL ?
Loading
Know the answer? Post it — somebody with the same question will find it here.
Sign in to answer this question
It is the same account you read, post and publish with — and you will come straight back to this page.
R ACHUTHAPosted Oct 29, 2012, 11:21 AM
A covering index is one which can satisfy all requested columns in a query without performing a further lookup into the clustered index.
There is no such thing as a covering query.
Have a look at this Simple-Talk article: Using Covering Indexes to Improve Query Performance.