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View the Exhibit and evaluate the structure and data in the CUST_STATUS table. You issue the following SQL statement: Which statement is true regarding the execution of the above query?
Correct Answer: C
Explanation/Reference: Explanation: The NULLIF Function The NULLIF function tests two terms for equality. If they are equal the function returns a null, else it returns the first of the two terms tested. The NULLIF function takes two mandatory parameters of any data type. The syntax is NULLIF(ifunequal, comparison_term), where the parameters ifunequal and comparison_term are compared. If they are identical, then NULL is returned. If they differ, the ifunequal parameter is returned.