I am an Access Beginner,
I have a medications database based on 3 tables...tblPatients, tblPatientMedications and tblMedications. I can query for patients using a single medication.
I need to query for patients who use:
1. both MedA AND MedB
2. both MedA AND MedB but NOT MedC
3.MedA OR MedB but...