kvsnramesh@gmail.com wrote:
> hi,
> I have a problem asked by one of my senior person and finding the
> answer .
> What is the step by step procedure for tune a large sql query.
> OR how do we tune a large SQL query with somany joins

Assuming "tune" means "make faster". One methodology: look at the
execution plan and see where the DB spends the time. Then go from there.
See also http://www.sql-server-performance.com/

Kind regards

robert