So, my teacher is an jerk, and threw this project at us without any examples. I'm not kidding. We just began SQL programming a week ago, and this particular project is giving me alot of headaches. I would appreciate any help.
3. Find the names of customers that have purchased items from two or more different employees, where the items have come from the same vendor.
4. Find the names of vendors that have had items sold by employees of only one department.