chester c young wrote:
create table access (name text, address ip)
I want to construct a SELECT statement which will return ONLY tuples
containing IP and name pairs IF there is an IP that has two or more
NAMEs associated with it.
many ways:
select a1.* from access a1 where exists(
select 1 from access a2 where a2.name=a2.name and a1.ip!=a2.ip );
select a1.*
from access a1
join access a2 using( name )
where a1.ip != a2.ip;
Those will return single entries as well (which is easy to do with an
"ORDER BY", that is computationally simpler)
What I want (and can't figure out) is a SELECT that returns ONLY tuples
with two or more NAME entries that have the same IP.
-- Karl
