Re: SQL question....

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