is a variety of mechanisms used to assure the integrity of a data unit or stream of data units.

Data integrity.

Explanation:

Data integrity is a variety of mechanisms used to assure the integrity of a data unit or stream of data units.

In Computer programming, integrity constraints can be defined as a set of standard rules that ensures quality information and database are maintained.

Basically, there are four (4) types of integrity constraints and these are;

1. Key constraints.

2. Domain constraints.

3. Entity integrity constraints.

4. Referential integrity constraints.

For example, when a foreign key in Table A points to the primary key of Table B, according to the referential integrity constraints, all the value of the foreign key in Table A must be null or match the primary key in Table B.

Hence, any integrity constraint ensures that the relationship between the data in a table is consistent and valid.

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