3 курс 2 семестр / lab6

USE hospital;
DELIMITER //  

CREATE PROCEDURE pr1 (IN n INT) 
BEGIN
	DECLARE i int DEFAULT 0;
    IF (n <= 12 and n >= 0) THEN
		label: while i<n do
			
				IF ((SELECT patients.gender FROM patients where id_pat = n) = "М") THEN
					SET @boys = @boys + 1;
				else
					SET @girls = @girls + 1;
				end if;
            set i = i + 1;
		end while label;
	else
		SELECT "Ошибка ввода";
	end if;
End//



SET @boys = 0;
SET @girls = 0;
set @summ = 12//
CALL pr1 (@summ)//
SELECT @boys, @girls//