Integrity constraints means..? how many and what are they?
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Answer Posted / swetcha
Integrity constraints provide a way of ensuring that
changes made to the database by authorized users do not
result in a loss of data consistency.
An integrity constraint can be any arbitrary predicate
applied to the database.
They may be costly to evaluate, so we will only consider
integrity constraints that can be tested with minimal
overhead.
Types of integrity constraints
(1) Non-null
(2) Key
(3) Referential integrity
(4) Attribute-based
(5) Tuple-based
(6) General assertions
plzz let me know if it's wrong
| Is This Answer Correct ? | 18 Yes | 9 No |
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