sql查询语句 --------一个表中的字段对应另外一个表中的两个字段的查询语句

例子:




一表中的price_start_station_id and price_end_station_id 和二表中的 station_id 对应

pdo_fetchall('select 其他字段,b.station_name as station_name1，c.station_name as station_name2 from '.tablename('goupiao_price').' a
left join '.tablename('goupiao_station').'b on a.price_start_station_id =b.station_id
left join '.tablename('goupiao_station').'c on
or a.price_end_station_id=c.station_id ');