insert overwrite table access select * from access where ip =0;
insert into mydb2.upflow select ip,sum(upflow) as sum from mydb2.access group by ip order by sum desc
create external table mydb2.upflow (ip string,sum string) row format delimited fields terminated by \',\';
sqoop export --connect jdbc:mysql://hadoop2:3306/userdb --username sqoop --password sqoop --table upflow --export-dir /usr/local/software/hive/warehouse/mydb2.db/upflow --input-fields-terminated-by \',\'