Question

I have a table like this:

|sub_account|name|email|
|-----------|----|-----|
// same account and same name: email different
|a1         |n1  |e1   |
|a1         |n1  |e2   |
// same account, name and email
|a2         |n2  |e3   |
|a2         |n2  |e3   |

I would like a query to get a table like this:

|sub_account|name|email|
|-----------|----|-----|
// nothing to do here
|a1         |n1  |e1   |
|a1         |n1  |e2   |
// remove the one that is exactly the same, but leave at least one
|a2         |n2  |e3   |

I’ve tried:

select sub_account, name, first(email)
from table
group by sub_account, name

but as you know "first" doesn’t exists in the DB2; what is the alternative to it?

thanks

Answer 1

select sub_account, name, email
from table
group by sub_account, name, email