>>My nephew asked for some help on a query and so far I can't seem to think of a good way to do it. Here is his question.
>>
>>A one-to-many relationship where the parent table is a list of customers and the child table is a list of things they've bought. It's easy enough to select customers who have bought a television. It's also simple to select customers who have bought a television or a couch. But how do I select customers who have bought both a television and a couch? The following is returning customers who have bought both or one of the items:
>>
>>
>>I don't have data to test with and I was hoping someone could had an idea.
>>
>>Thanks
>
>I would have done essentially the same as Naomi but changing the HAVING clause to be

>HAVING COUNT(*) = < number of items in list >

You would need count(distinct(ProductId)) in this case. Simple count would not work.