How to improve performance of a view.We have a view whose base table is full refresh everyday and it does a lot of left joins with staging and dimension tables.This view is then used to poplulate fact table.The issue is with its performance.how can we reduce the time to poplulate fact table from this view?
There is no way to just make a view faster except by materializing the view into a clustered index. A view is just a query. And, you're running queries against the view in some fashion. It's those queries that have to be correctly written in order to take advantage of any existing indexes in the table. Also, those queries will help you determine whether or not there are any new indexes needed. But, it's all about understanding how the queries are working and what they're doing in order to then tune the queries. For lots more details, see my book on Amazon