How does SQL Server handle updates on views. I am worried about performance and wanted to know overview of how and when views change.
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How does SQL Server handle updates on views. I am worried about performance and wanted to know overview of how and when views change.
A [non-materialized] view is just a stored query that gets run when you use the view name in a query.
Performance for a [non-materialized] view comes from the query getting cached, because the view’s underlying query doesn’t change. Once the view query is altered, the first time will take a little longer than subsequent ones because there’s nothing in the query cache.
You can use sp_refreshview, but have I have experienced locking (even within a READUNCOMMITTED transaction).
Materialized (“indexed” in TSQL/SQL Server) views are a different matter.