Question

What is Referential Integrity in the context of relational tables?

a.

Integrity of data during replication

b.

Integrity between related tables; established if non-null values in the foreign key field of the child table are primary key values in the parent table

c.

Integrity of data during reverse engineering

d.

Integrity of data in multidimensional data cubes

Posted under Data Warehousing and OLAP

Answer: (b).Integrity between related tables; established if non-null values in the foreign key field of the child table are primary key values in the parent table Explanation:Referential Integrity refers to two relational tables that are directly related. It is established if non-null values in the foreign key field of the child table are primary key values in the parent table.

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