Sales Vendors x clients.

[#1]

Goodnight everyone,

try to be as detailed as possible with the problem I'm experiencing.

I have a table of customers and vendors on the vendors.

goat to know how can I have the sales of a particular vendor in another column, and salesof those customers last year.

If some clients last year is part of another vendor does not matter. What I want to know ifthat vendor's selling but this year than last year these clients.

I hope both been very clear.

Thanks,

Gleybson Fernandes

[#2]

explaining better

I have the seller "A" and this year he sold to customers B, C and D.

Client B year last year belonged to the seller.

So what I want is a simple table with the graph size

Seller expression the sum of sales of his clients and another column with the sales of these customers.