我在 access 2010 中有三个表(room_info、student_info、commercial_info)
1- 房间信息
room_id - autonumber - primary key
room_no - number
floor_no - text
part_type - text
year_reserved - text
2-学生信息
student_id - autonumber - primary key
student_name - text
college - text
dept - text
stage - text
card_id - number
mobile_No - number
room_id - number - foreign key
3- 商品信息
commodity_id - autonumber - primary key
chair - number
desk - number ..............
room_id - number - foreign key
我想在 c# 中进行选择查询以从这三个表中选择数据?