DELIMITER//
CREATE PROCEDURE calcular descuento(
    IN compra DECIMAL(10,2)
)
BEGIN
DECLARE descuento DECIMAL (10,2);
DECLARE total DECIMAL (10,2);
DECLARE porsentaje DECIMAL (5,2);



IF compra >=2000 THEN
SET porsentaje =20;
ELSEIF compra >1000 THEN
SET porsentaje =10;

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