MySQL 多表关联查询（为表名、列名设置别名）

1. t_order 表
   

2. t_member 表
   

3. t_setmeal 表
   

根据 t_order 表的 id 查询对应的信息

select m.name AS member,
			 s.name AS setmeal,
			 o.orderDate AS orderDate,
			 o.orderType AS orderType
from
			 t_order o,
			 t_member m,
			 t_setmeal s
where o.member_id=m.id and o.setmeal_id=s.id and o.id= 5