On Thu, 28 Aug 2003, teknokrat wrote:
I have a table that has about 20 foreign key constraints on it. I think this is a bit excessive and am considering removing them ( they are all related to the same table and I don't think there is much chance of any integrity violations ). Would this improve performance or not?
It depends on your frequency of inserts/updates to the table with the constraint and the frequency of update/delete to the table(s) being refered to. My guess is probably. You may wish to leave some of the constraints (decide which are the most important), but 20 does seem a bit excessive in general.
The references are all to the same table i.e. they are employee ids, so leaving some and not others would make no sense. The table has no deletes, small amount of inserts and moderate amount of updates. However there are many selects and its their performance I am most concerned with.
thanks
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