What does the EXISTS operator do in SQL? MCQ with Answer and Explanation

Explanation:
DBMS provides numerous benefits including data sharing, concurrency control, integrity, security, and reduces development time.

Explanation:
Denormalization is a strategy applied to normalized databases where redundant data is selectively added to speed up complex read queries by minimizing costly table joins.

Explanation:
An Insertion Anomaly occurs when certain facts cannot be recorded in a database table without falsely manufacturing or requiring the presence of other unrelated facts.