inner join :内连接
as : 别名
on : 之后跟内连接的条件
sample:
select username from user_booker as t1 inner join user_product as t2 on t1.username = t2.username ;
inner join :内连接
as : 别名
on : 之后跟内连接的条件
sample:
select username from user_booker as t1 inner join user_product as t2 on t1.username = t2.username ;