yuvipoy (3/4/2014)
Thanks for your quick replay.uniqueidentifier column(with primary key (now)) has been used in table joining in current design.
so if i remove the current primary key on uniqueidentifier, will the join perfomace degrade or grade(improve).
I realize it is your primary key. That as a primary key is another topic. Is it also the clustered index? That is the problem here.
I would recommend NOT removing your primary key on several 10 million row tables. Your performance will be even worse.
What does this query return?
select *
from sys.indexes
where OBJECT_NAME(object_id) = 'YourBaseTable' --whatever the name of your table is
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