4 курс 1 семестр / Курсовая / SQL / PR5

DELIMITER $$
CREATE PROCEDURE `pr5`(IN pass_id INT)
BEGIN
SELECT passangers.pass_id, passangers.name, COUNT(tikets.seat) as reserved_seats
FROM tikets
JOIN passangers ON tikets.pass_id = passangers.pass_id
WHERE tikets.pass_id = pass_id
GROUP BY passangers.name;

IF NOT EXISTS (SELECT * FROM tikets WHERE tikets.pass_id = pass_id) THEN
SELECT 'Данные по этому пассажиру не найдены' as 'Error';
END IF;

END $$
DELIMITER ;

CALL pr5(13);

drop procedure pr5;