Oracle
1Z0-146 · Question #143
1Z0-146 Question #143: Real Exam Question with Answer & Explanation
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Question
Click on the EXHIBIT button and examine the structure of the DEPARTMENT and EMPLOYEE tables. Evaluate this SQL statement: CREATE INDEX emp_dept_id_idx ON employee(dept_id); Which result will the statement provide?
Exhibit
Options
- AStore an index in the EMPLOYEE table.
- BIncrease the chance of full table scans.
- CMay reduce the amount of disk I/O for SELECT statements.
- DMay reduce the amount of disk I/O for INSERT statements.
- EOverride the unique index created when the FK relationship was defined.
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