摘要： 举例子：hive> select * from zz0; 111111 222222 888888 hive> select * from zz1; 111111 333333 444444 888888 hive> select * from zz0 join zz1 on zz0.uid = zz1.uid; 111111 111111 888888 888888 hive> select * from zz0 left outer join zz1 on zz0.uid = zz1.uid; 111111 111111 222222 NULL 888888 888 阅读全文