4 курс 1 семестр / Курсовая / SQL / PR2

DELIMITER $$
CREATE PROCEDURE `pr2`(IN start_year INT, IN end_year INT, IN airline_code VARCHAR(2))
BEGIN
SELECT planes.plane_id, planes.type, planes.year, planes.seats, planes.firm
FROM planes
JOIN flights ON planes.plane_id = flights.plane_id
WHERE year >= start_year AND year <= end_year AND flights.airline_code = airline_code;

IF NOT EXISTS (SELECT * FROM planes JOIN flights ON planes.plane_id = flights.plane_id WHERE planes.year BETWEEN start_year AND end_year AND flights.airline_code = airline_code) THEN
SELECT 'Данные по этому году и авиакомпании не найдены' as 'Error';
END IF;
END $$
DELIMITER ;

CALL pr2(2010, 2020, 'DP');

drop procedure pr2;