from 后面两个表,一个有inner join 一个没有。有啥区别捏?select * from tb1, tb2 where tb1.city tb2.ci
from 后面两个表,一个有inner join 一个没有。有啥区别捏? select * from tb1, tb2 where tb1.city = tb2.city and tb1.name = tb2.name 和 select * from tb1 inner join tb2 on tb1.city = tb2.city and tb1.name = tb2.name