Non atomic data types and quantity pricing

I am making a database to store product information. I
am going to need to use quantity pricing breaks
(different prices for buying a lot).

I was first thinking that I should use a seperate
table and, for each product have several rows, which
is how many people do that. But that method seems
somewhat awkward, so I thought an array type would be
a better solution.

However, when I thought about it some more and read
more documentation, I found that the select statements
I would need would be nearly impossible. For example:

I want to get the price for quantity X so i need to
select the greatest value in the array that is less
than X as the quantity break value that applies to
them.

Could someone help me find a solution involving
arrays?

Thanks,
Jeff Davis
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