Database Management
primer-original-v2mediumDatabase Management08 Dcl & Database Objectsprimer-original-v2

CREATE INDEX emp_dept_id_idx ON employee(dept_id); Which of the following statements are true with respect to the above index?

Answer options

A
May reduce the amount of disk I/O for SELECT statements.
B
Stores an index in the EMPLOYEE table.
C
Increases the chance of full table scans.
D
Overrides the unique index.

Correct answer: May reduce the amount of disk I/O for SELECT statements.

Explanation

Quick AnswerThe correct answer is May reduce the amount of disk I/O for SELECT statements. because it directly addresses the core logic of Database Management.

This question has been retained as-is due to its unique context.

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