Question

_______ ensures that related data exist in parent table before allowing an entry into a child...

_______ ensures that related data exist in parent table before allowing an entry into a child table.

A. SQL

B. Data redundancy

C. Data Integrity

D. Referential integrity

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Answer #1

Answer:

Correct answer is:

D. Referential integrity

Explanation:

Referential integrity ensures all references are valid. It ensures that related data exist in parent table before allowing an entry into a child table.

SQL is structured query language.

Data redundancy means there are data in tables which are repeated.

Option D is most appropriate and other options A, B and C are incorrect.

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