Hi, I was wondering if it is possible to do this with a single query rather than iterate over all of the rows in an application:
I have a table which for brevity looks like: create table offers { integer id; integer product_id; double price; } where for each product there is a number of offers in this table. Now my question: Is it possible to obtain the difference between just the minimum price and the next one up per product, so say I have the following data: id, product_id, price 123, 2, 10.01 125, 2, 10.05 128, 2, 11.30 134, 3, 9.45 147, 3, 11.42 157, 3, 12.08 167, 3, 12.09 then I would like the following returned product_id, difference 2, .04 (10.05-10.01) 3, 1.97 (11.42-9.45) ,etc Any ideas? Thanks John -- Got needs? Get Goblin'! - http://www.pricegoblin.co.uk/