-------- Forwarding messages --------
From: "崔苗" <[email protected]>
Date: 2018-08-25 10:54:31
To: [email protected]
Subject: multiple group by action
Hi,
we have some user data with columns(userId,company,client,country,region,city),
now we want to count userId by multiple column,such as :
select count(distinct userId) group by company
select count(distinct userId) group by company,client
select count(distinct userId) group by company,client,country
select count(distinct userId) group by company,client,country,region
etc
so each action will bring a shuffle stage, as for columns( company,client)
contain column company,
Is there a way to reduce shuffle stage?
Thanks for any replys
