在hive查询中我们发现hive的查询输出不显示列名，怎么解决呢？
解决办法：进入hive cli后： set hive.cli.print.header=true;
hive> select * from ratings limit 5;
OK
ratings.userid ratings.movieid ratings.rating ratings.timestamped
1 1193 5.0 978300760
1 661 3.0 978302109
1 914 3.0 978301968
1 3408 4.0 978300275
1 2355 5.0 978824291
Time taken: 0.1 seconds, Fetched: 5 row(s)此时显示的字段名带表名，可读性很差，继续在hive cli中：set hive.resultset.use.unique.column.names=false;
hive> set hive.resultset.use.unique.column.names=false;
hive> select * from ratings limit 5;
OK
userid movieid rating timestamped
1 1193 5.0 978300760
1 661 3.0 978302109
1 914 3.0 978301968
1 3408 4.0 978300275
1 2355 5.0 978824291
Time taken: 0.103 seconds, Fetched: 5 row(s)OK！！！