将如图所示的excel文件中,各个字段下的对应广告位以数组的形式呈现如下图锁所示:
1.利用hive的数据传输工具上传数据文件,并建表
2. 函数collect_set的用法
select 'country' ,country,collect_set(placementid)
from 2019q2
group by country
union all
select 'year' ,year,collect_set(placementid)
from 2019q2
group by year
union all
select 'quarter' ,quarter,collect_set(placementid)
from 2019q2
group by quarter
1.利用mysql客户端navicat for mysql批量导入excel文件,并建表
2.使用mysq函数group_concat的用法
select 'country' ,country,group_concat(placementid)
from 2019q2
group by country
union all
select 'year' ,year,group_concat(placementid)
from 2019q2
group by year
union all
select 'quarter' ,quarter,group_concat(placementid)
from 2019q2
group by quarter
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