Question

Explain Referenitial Integrity with the help of an explain ( class 10 ) ​

Answer 1

Answer:

A value appearing in a one table for a given set of attributes also appears for another set of attributes in another table. This is called referential integrity. • A referential integrity constraint is specified between two tables and is used to maintain the consistency among tuples in the two relations.

Explanation:

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Answer 2

• A value appearing in a one table for a given set of attributes also appears for another set of attributes in another table. This is called referential integrity.

• A referential integrity constraint is specified between two tables and is used to maintain the consistency among tuples in the two relations.

• The tuple in one table refers only to an existing table in another relation.

Referential integrity in SQL:-

• Foreign key is used to show relation into two tables in relational algebra.

• This helps in maintaining consistency in database, as foreign key cannot be inserted, deleted or updated.