The views are very tricky. Sometimes they help performance and sometimes they negatively impact performance. Recently, during Comprehensive Database Performance Health Check, I realized that one of the view was the real performance killer. The challenge was to identify column used in a view. We decided to open the view and list all the columns but that was very cumbersome tasks. Finally, we decided to write a script which can help identify columns used in a view.
I have previously written on the subject SQL SERVER – The Limitations of the Views – Eleven and more…. This was indeed a very popular series and I had received lots of feedback on that topic. Today we are going to discuss something very interesting as well. Let us learn about the issue of index created on view on used often.