Give a types of JOIN

Answer 1

JOINS are classified into following types
1 . inner/equi/simple join
2.non equi join
3 . natural join
4 . outer join
¡.left outer join
¡¡.right outer join
¡¡¡.Full outer join
5 . self join
6 . cross join/cross product join

Answer 2

inner join
outer join
left join
right join
natural join

Answer 3

inner outer and cross as far as i know of

Answer 4

inner join; outer join( right outer ,and left outer join) for now that's what I know.