| | Entity Integrity Rule - The Entity Integrity Rule enforces that the Primary key cannot be Null. |
| | Foreign Key Integrity Rule - The FKIR denotes that the relationship between the foreign key and the primary key has to be enforced.When there is data in Child Tables the Master tables cannot be deleted. |
| | Business Integrity Rules - The Third Integrity rule is about the complex business processes which cannot be implemented by the above 2 rules. |
how many Integrity Rules are there
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