本文共 744 字,大约阅读时间需要 2 分钟。
举例子:
hive> select * from zz0;
111111 222222 888888 hive> select * from zz1; 111111 333333 444444 888888hive> 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 888888 hive> select * from zz0 right outer join zz1 on zz0.uid = zz1.uid; NULL 111111 111111 NULL 333333 NULL 444444 888888 888888 hive> select * from zz0 full outer join zz1 on zz0.uid = zz1.uid; NULL 111111 111111 222222 NULL NULL 333333 NULL 444444 888888 888888 hive> select * from zz0 left semi join zz1 on zz0.uid = zz1.uid; 111111 111111 888888 888888
本文转自茄子_2008博客园博客,原文链接:http://www.cnblogs.com/xd502djj/archive/2013/01/21/2869366.html,如需转载请自行联系原作者。