Question

I have a table like this:

Item    ProviderId

Item1   1

Item1   2

Item2   1

Item3   1

I wish to get a new table. In the new table, it only lists the items who has at least two different ProviderIds.

So in the above example, since only item1 has two different ProviderId I wish to get table like this:

Item

Item1

How can I write the statement to do this?

Answer 1

You have to use group by and having:

select item
from table
group by item
having count(distinct ProviderId)>=2

or without distinct

select item
from tab
group by item, ProviderId
having count(1)>=2;

sql fiddle demo

With query as table:

select item
from (select item, ptoviderId from tabA) as tab
group by item, ProviderId
having count(1)>=2;

If you want to create new table, you can use into:

select item
into newTable
from table
-- or (select item, ptoviderId from tabA)
group by item
having count(distinct ProviderId)>=2