NATURALINNERJOIN Performs an inner join of a table with another table. The tables are joined on common columns (by name) in the two tables. If the two tables have no common column names, an error is returned.
LeftJoinTable – A table expression defining the table on the left side of the join.
RightJoinTable – A table expression defining the table on the right side of the join.
A table which includes only rows for which the values in the common columns specified are present in both tables. The table returned will have the common columns from the left table and other columns from both the tables.