小弟 跪求高手！怎么将两个sql语句和一起 既查出起始-中转-到达城市的信息也查出起始-到达城市的信息
时间：2011-07-15
来源：互联网
//查的是起始-中转-到达城市的信息
select c1.*, a1.area as StartCity, a2.area as MidCity, a3.area as EndCity from `customer` as c1, `area` as a1, `area` as a2, `area` as a3 where c1.StartCity = a1.value and c1.EndCity = a3.value and c1.MidCity = a2.value
//查的是起始-到达城市的信息
select c1.*, a1.area as StartCity, a2.area as MidCity, a3.area as EndCity from `customer` as c1, `area` as a1, `area` as a2, `area` as a3 where c1.StartCity = a1.value and c1.EndCity = a3.value and c1.MidCity = a2.value
请问 怎么将两个sql语句和一起 既查出起始-中转-到达城市的信息也查出起始-到达城市的信息
select c1.*, a1.area as StartCity, a2.area as MidCity, a3.area as EndCity from `customer` as c1, `area` as a1, `area` as a2, `area` as a3 where c1.StartCity = a1.value and c1.EndCity = a3.value and c1.MidCity = a2.value
//查的是起始-到达城市的信息
select c1.*, a1.area as StartCity, a2.area as MidCity, a3.area as EndCity from `customer` as c1, `area` as a1, `area` as a2, `area` as a3 where c1.StartCity = a1.value and c1.EndCity = a3.value and c1.MidCity = a2.value
请问 怎么将两个sql语句和一起 既查出起始-中转-到达城市的信息也查出起始-到达城市的信息
作者: wxjlogo 发布时间: 2011-07-15
SQL code
select c1.*, a1.area as StartCity, a2.area as MidCity, a3.area as EndCity from `customer` as c1, `area` as a1, `area` as a2, `area` as a3 where c1.StartCity = a1.value and c1.EndCity = a3.value and c1.MidCity = a2.value union all select c1.*, a1.area as StartCity, a2.area as MidCity, a3.area as EndCity from `customer` as c1, `area` as a1, `area` as a2, `area` as a3 where c1.StartCity = a1.value and c1.EndCity = a3.value and c1.MidCity = a2.value
作者: rucypli 发布时间: 2011-07-15
可是 我要查询的俩个不同的sql语句 你那两个sql 语句都是相同的啊
作者: wxjlogo 发布时间: 2011-07-15
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