У меня есть следующий набор данных:
CREATE TABLE IF NOT EXISTS 'cars' (
'car_id' int(11) NOT NULL AUTO_INCREMENT,
'car_name' varchar(20) NOT NULL,
PRIMARY KEY ('car_id')
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=3 ;
INSERT INTO 'cars' ('car_id', 'car_name') VALUES
(1, 'Mercedes'),
(2, 'BMW');
CREATE TABLE IF NOT EXISTS 'orders' (
'order_id' int(11) NOT NULL AUTO_INCREMENT,
'order_car_id' int(11) NOT NULL,
'order_date_checkin' datetime DEFAULT NULL,
'order_date_dropoff' datetime DEFAULT NULL,
PRIMARY KEY ('order_id')
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=3 ;
INSERT INTO 'orders' ('order_id', 'order_car_id', 'order_date_checkin', 'order_date_dropoff') VALUES
(1, 1, '2018-01-17 10:00:00', '2018-01-19 21:00:00'),
(2, 1, '2018-01-22 14:00:00', '2018-01-25 17:00:00');
Просто мне нужно проверить, доступен ли автомобиль в диапазоне дат. Мне нужно это условие:
Не возвращайте mercedes, когда
Check in date Check out date
2018-01-16 2018-01-20
2018-01-17 2018-01-20
2018-01-17 2018-01-21
Возвращает mercedes, когда:
Check in date Check out date
2018-01-16 2018-01-16
2018-01-16 2018-01-17
2018-01-19 2018-01-21
2018-01-20 2018-01-21
2018-01-27 2018-01-30
Моя база данных находится по этой ссылке: http://sqlfiddle.com/#!9/28a38d/1
DROP TABLE IF EXISTS rules;
CREATE TABLE rules
(rule_id INT NOT NULL AUTO_INCREMENT PRIMARY KEY
,Check_in_date DATE NOT NULL
,Check_out_date DATE NOT NULL
);
INSERT INTO rules (Check_in_date,Check_out_date) VALUES
('2018-01-16','2018-01-20'),
('2018-01-17','2018-01-20'),
('2018-01-17','2018-01-21'),
('2018-01-16','2018-01-16'),
('2018-01-16','2018-01-17'),
('2018-01-19','2018-01-21'),
('2018-01-20','2018-01-21'),
('2018-01-27','2018-01-30');
SELECT c.*
, r.*
FROM cars c
JOIN rules r
LEFT
JOIN orders o
ON o.order_car_id = c.car_id
AND o.order_date_checkin <= r.check_out_date -- may be you meant <
AND o.order_date_dropoff >= r.check_in_date -- may be you meant >
WHERE o.order_id IS NULL;
+--------+----------+---------+---------------+----------------+
| car_id | car_name | rule_id | Check_in_date | Check_out_date |
+--------+----------+---------+---------------+----------------+
| 2 | BMW | 1 | 2018-01-16 | 2018-01-20 |
| 2 | BMW | 2 | 2018-01-17 | 2018-01-20 |
| 2 | BMW | 3 | 2018-01-17 | 2018-01-21 |
| 1 | Mercedes | 4 | 2018-01-16 | 2018-01-16 |
| 2 | BMW | 4 | 2018-01-16 | 2018-01-16 |
| 1 | Mercedes | 5 | 2018-01-16 | 2018-01-17 |
| 2 | BMW | 5 | 2018-01-16 | 2018-01-17 |
| 2 | BMW | 6 | 2018-01-19 | 2018-01-21 |
| 1 | Mercedes | 7 | 2018-01-20 | 2018-01-21 |
| 2 | BMW | 7 | 2018-01-20 | 2018-01-21 |
| 1 | Mercedes | 8 | 2018-01-27 | 2018-01-30 |
| 2 | BMW | 8 | 2018-01-27 | 2018-01-30 |
+--------+----------+---------+---------------+----------------+
SELECT c.* FROM cars c LEFT JOIN orders o ON o.order_car_id = c.car_id AND o.order_date_checkin <= '2018-01-20' AND o.order_date_dropoff >= '2018-01-18' WHERE o.order_id IS NULL ORDER BY
c .
car_id` DESC; `просто я обновил ваш запрос и он заработал