The CUSTOMERS table has the following structure: Exhibit: You need to write a query that
does the following task: * Display the first name and tax amount of the customers. Tax is 5%
of their credit limit * Only those customers whose income level has a value should be
considered * Customers whose tax amount is null should not be considered Which
statement accomplishes all the required tasks?
A.
SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNT FROM customers
WHERE cust_income_level IS NOT NULL AND cust_credit_limit IS NOT NULL;
B.
SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNT FROM customers
WHERE cust_income_level <> NULL AND tax_amount <> NULL;
C.
SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNT FROM customers
WHERE (cust_income_level,tax_amount) IS NOT NULL;
D.
SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNT FROM customers
WHERE cust_income_level IS NOT NULL AND tax_amount IS NOT NULL;