Hive Full Outer Join Returning multiple rows for same Join Key
问题 I am doing full outer join on 4 tables on the same column. I want to generate only 1 row for each different value in the Join column. Inputs are: employee1 +---------------------+-----------------+--+ | employee1.personid | employee1.name | +---------------------+-----------------+--+ | 111 | aaa | | 222 | bbb | | 333 | ccc | +---------------------+-----------------+--+ employee2 +---------------------+----------------+--+ | employee2.personid | employee2.sal | +---------------------+--------