What type of entity cannot be uniquely identified by its own attributes alone and must rely on a relationship with a parent entity? MCQ with Answer and Explanation

Explanation:
Out of all available candidate keys, the one selected to identify rows uniquely is the primary key, and the remaining unselected candidate keys are called alternate keys.

Explanation:
ROLLBACK reverts the database to the state it was in at the beginning of the transaction, undoing all changes.

Explanation:
The IN operator allows you to specify multiple literal values or a subquery inside a WHERE clause, testing if an attribute matches any element in the list.