In this recipe, you will learn how to use left, right and full outer joins in Hive.

In Hive, left/right/full outer joins behave in the same manner as in relation to RDBMS. For a left outer join, all the rows from the table on the left are displayed and the matching rows from the right. All the unmatched rows from the table on the right will be dropped and Null will be displayed. A right outer join is just the reverse of a left outer join.

The left outer join is as follows:

Left join in Hive

A right outer join behaves the opposite to a left outer join. In this join, all the rows from the right table and the matching rows from the left table are displayed. All the unmatched rows from the table on the left will be dropped and Null will be displayed.

A right outer join is as follows:

Right join in Hive

In a full outer join, all the rows will be displayed from both the tables. A full outer join combines the result of the left outer join and the right outer join.

A full...