Home » Oracle » 1z0-051 » Which statement is true regarding the above two queries?
Evaluate the following two queries:
Exhibit:
Exhibit:
Which statement is true regarding the above two queries?
A. Performance would improve in query 2 only if there are null values in the CUST_CREDIT_LIMIT column
B. Performance would degrade in query 2
C. There would be no change in performance
D. Performance would improve in query 2
Correct Answer: C
Explanation/Reference:
Explanation:
Note: The IN operator is internally evaluated by the Oracle server as a set of OR conditions, such as a=value1 or a=value2 or a=value3. Therefore, using the IN operator has no performance benefits and is used only for logical simplicity.
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