案例:将工厂名和所在地点输出
原始数据为factory.txt工厂库和address.txt地址库
【factory.txt】如下:
factoryname addressId
Beijing Red Star 1
Shenzhen Thunder 3
Guangzhou Honda 2
Beijing Rising 1
Guangzhou Development Bank 2
Tencent 3
Back of Beijing 1
【address.txt】如下:
addressID addressname
1 Beijing
&n