Sandhya.Kishan

 Profile Answers by Sandhya.Kishan 

• Apr 5th, 2012

 

There are 3 rules to enforce table level integrity.
1.Foreign key value can be modified only if we want to match the corresponding primary key value.
2.We cannot delete records either from parent or child table as long as they contain matching records.
3.We cannot modify the parent record if the child table contains a matching record.