Hi !,
Is it wise to define foreign keys for referential entegrity ?
Example : I have a customer table with 40 fields. Out of that 40 fields, 10 fields contain information linked to other tables. So, is defining foreign keys for these 10 fields a good idea ? Because from what I understand, for every foreign key, there is an index defined. So, all these indexes has to be maintained. Is that killing performance ? What's the best practise : defining foreign keys or not ?
Thanks a lot,
Nico Callewaert
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