Hive：DQL(查询操作)

查询操作1

• select 字段列表 
  from 表名
  where 条件 
  group by 分组字段 
  having 分组条件
  order by 排序条件 desc顺序
  limit 限制条数;
  ------------------------------------------------------
  select '140421', ip, count(ip) as cnum f
  rom hmbbs 
  where logdate='140421' 
  group by ip 
  having cnum > 50 
  order by cnum 
  desc limit 20;