A strange title I guess!
Basically, I have our client data in SQL and our sales team want to do some cross selling based on clients who have purchased certain products and services but not others.
I have a line of data for a client for each product they purchase so my columns would be similar to below: -
Using the example above I would like to be able to see who has Product 1 but hasnt purchased product 2 (in this case Mr J Smith). If that makes sense?
I just cant seem to get this right in my head, despite it being a relatively simple request!
Anyone point me in the right direction?
Many thanks