I have an employees table and one column in the employees table is
"supervisor_id" which is an FK to the id column.
I have employees from numerous companies all in the same table. I have
a column called company_id that indicates the company.
I want to make sure that an employee chooses a supervisor from the same
company. I have a column called company_ID. How do I make sure that
the employee company ID matches the supervisor's company ID?
Do I need to use a trigger or is there a way I can do this with foreign
keys?
TIA
Matt
