I have table of items bought by customers, with a sequence number to indicate 1st, 2nd 3rd..... purchase:
Customer, Sequence, Item
PX2, 2, Handbag
PX3, 1, Coat
PX3, 3, Hat
I want to show a chart which lists customers' 1st and 2nd purchases. But I want to show the user a list of items. From the list they will select a 1st purchased item (eg. Coat) and then list all customers who purchased this item first. But crucially I want to also show what they purchased 2nd.