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DROP FUNCTION IF EXISTS CustomerLevel;
DELIMITER $$
CREATE FUNCTION CustomerLevel(
credit DECIMAL(10,2)
)
RETURNS VARCHAR(20)
DETERMINISTIC
BEGIN
DECLARE customerLevel VARCHAR(20);
IF credit > 50000 THEN
SET customerLevel = 'PLATINUM';
ELSEIF (credit <= 50000 AND
credit >= 10000) THEN
SET customerLevel = 'GOLD';
ELSEIF credit < 10000 THEN
SET customerLevel = 'SILVER';
END IF;
-- return the customer level
RETURN (customerLevel);
END$$
DELIMITER ;
SHOW FUNCTION STATUS WHERE db = 'classicmodels';
SELECT CustomerLevel(5000);
SELECT CustomerLevel(15000);
SELECT CustomerLevel(50001);
SELECT
customerName,
CustomerLevel(creditLimit)
FROM
customers
ORDER BY
customerName;