Question

In a relational database a referential integrity constraint can be specified with the help of

Answer 1

Answer:

Explanation:

In a relational database a referential integrity constraint can be specified with the help of Primary and Foreign key.

Primary key is used to uniquely identify record in a table. It can be combination of multiple columns in the table. Columns in primary key should not have NULL data.

Foreign key refers to primary key in another table. There can be multiple records of foreign key in another table.

Answer 2

Answer: foreign key

Explanation:

Because primary key of the parent table can be used as reference of

the child table by using foreign key.