Combine 2 queries with sum involved

Question

I have 2 similar queries that both look like this with only the table being switched from Treatment to Patient in the second query:

SELECT Treatment.Phys_ID AS P         


        

Answer 1

You can use subqueries to add the charges at the Physician level:

SELECT Physician.Phys_ID AS Phys_ID, Physician.FName, Physician.LName, 

  (SELECT Nz(Sum(Treatment.Charge)) 
   FROM Treatment WHERE Treatment.Phys_ID = Physician.Phys_ID) +

  (SELECT Nz(Sum(Patient.Charge))
   FROM Patient WHERE Patient.Phys_ID = Physician.Phys_ID) As Total Charge

FROM Physician;

Alternatively, you can use DSum (strictly an MS Access function and not ANSI SQL).

SELECT Physician.Phys_ID AS Phys_ID, Physician.FName, Physician.LName, 

   Nz(DSum("Charge", "Treatment", "Phys_ID =" &  Physician.Phys_ID)) +

   Nz(DSum("Charge", "Patient", "Phys_ID =" & Physician.Phys_ID)) As Total Charge

FROM Physician;