HiveJoin操作HiveJoinHSQL中join与left-join区别left join on and 与 left join on where的区别
HiveJoinjoin_table:table_reference JOIN table_factor [join_condition] |table_reference {LEFT|RIGHT|FULL} [OUTER] JOIN table_referencejoin_condition | table_reference LEFT SEMI JOIN table_referencejoin_condition | table_reference CROSS JOIN t