經過許多城市

Question

CREATE TABLE IF NOT EXISTS `ride` (
    `id` int(11) NOT NULL AUTO_INCREMENT, 
    `from` text CHARACTER SET utf8 COLLATE utf8_polish_ci NOT NULL, 
    `to` text CHARACTER SET utf8 COLLATE utf8_polish_ci NOT NULL, 
    PRIMARY KEY (`id`) 
) 

CREATE TABLE IF NOT EXISTS `route_through` (
    `id` int(11) NOT NULL AUTO_INCREMENT, 
    `id_ride` int(11) NOT NULL, 
    `city` text COLLATE utf8_polish_ci NOT NULL, 
    PRIMARY KEY (`id`) 
) 

搜索路線，我需要尋找ride：

SELECT * FROM ride WHERE from=$from and to=$to 

如何搜索，如果我在route_through有城市？

例如：

ride表：

id = 1

from =巴黎

to =倫敦

route_through表：

id = 1

id_ride = 1

city = '皇馬'

搜索形式：

現在我在形式上這個城市設置：from - 馬德里to倫敦。這應該返回ride與id = 1

如何做到這一點？

Answer 1

使用JOIN

SELECT * 
FROM ride r inner join route_through rt on r.id = rt.id 
WHERE from=$from and to=$to