Question

Revised Again:

SELECT x.Imaging, x.Indication FROM medicalimaging x 
 WHERE MCGID = '1036' 
and x.Indication not in (
select Indication FROM invoicefields a join invoices b on a.InvoiceNumber = b.InvoiceNumber WHERE a.PatientID = '10120003' and x.MCGID = b.StudyID and x.Imaging = a.TypeOfExam
)
Order By Imaging ASC, Indication ASC

Thank you all for your answers, I did some research and this is what I cam up with.

SELECT x.Imaging, x.Indication
FROM medicalimaging x
WHERE MCGID =  'McG 1032'
AND x.Indication NOT 
IN (

SELECT Indication
FROM invoicefields a
JOIN invoices b ON a.InvoiceNumber = b.InvoiceNumber
WHERE a.PatientID =  '10120003'
AND x.MCGID = b.StudyID
)

I am trying to figure out what already has been invoiced and exclude it from a list. These are my tables, some sample data, and the query results.

Medical Imaging ( These are the fields to be used in the list)
id | MCGID | Imaging | Indication 
1    1032     Xray       Visit 1
2    1032     Xray       Visit 2
3    1032     Xray       Visit 3
4    1032     CT         Emergency
5    1045     Xray       Initial

invoice ( Generic Invoice Data)
InvoiceNumber | StudyID |     TypeInvoice       | void | 
     1            1032        Medical Imaging        0 
     2            1045        Medical Imaging        0
     3            1032        Medical Imaging        1
     4            1032        Medical Imaging        0 

Invoicefields ( The Rows of charges in the Invoice ) 
InvoiceNumber     |    PatientID   |    TypeofExam   | Indication 
1                   PT25        Xray            Visit 1   
1                   PT30        Xray            Visit 1   
2                   PT36        Xray            Initial
2                   PT25        Xray            Initial
4                   PT25        Xray            Visit 2   
4                   PT30        Xray            Visit 2   
4                   PT25        Xray            Visit 3   

After Query Results


Ex. 1 Provided  MCGID=1032  and PatientID=PT25.

Results:   CT , Emergency


Ex. 2 Provided  MCGID=1032  and PatientID=PT30.


Results:           Xray    ,    Visit 3         
                   CT       ,   Emergency

So, This is the generic structure. For reference, MCGID is the SAME as StudyID, and Type of Exam is the SAME as Imaging. Another thing to note is MCGID is unique, and PatientID is only unique to the MCGID. This means that the PatientID can be reused for another MCGID. For the Query to run, I will provide it with PatientID, and MCGID. So my goal is to create a list of potential Imaging and Indications that are not listed in the invoicefields under TypeofExam and Indication. Also, it should also ignore the invoice number if void=1.

EDIT :

I understand basic sql functions, I understand how to pull data from multiple tables, I just dont get how to cross reference data from multiple tables. The issue is I have to cross reference data about 3 times. So this is where I am at now.

SELECT medicalimaging.Imaging,medicalimaging.Indication FROM medicalimaging WHERE MCGID='1032'

I am just not sure how to tell it to get the data from the other tables and compare it to the data I am about to pull.

Answer 1

Easiest solution is to use exist to find Imaging data having invoices and exclude them:

select *
 from MedicalImaging mi
 where mi.mcgid = 1032
   and not exists (select null
                     from Invoice i
                    inner join InvoiceFields f
                       on i.invoicenumber = f.invoicenumber
                    where i.studyid = mi.mcgid
                      and i.void = 0
                      and f.typeOfExam = mi.imaging
                      and f.Indication = mi.indication
                      and f.PatientID = 'PT30')

I had to be creative here. I’ve added InvoiceFields.Indication = MedicalImaging.Indication to be able to narrow down repeated exams. The reasoning behind this schema is unclear to me. Perhaps you have undisclosed tables concerning patients that would explain how you know which PatientID to supply for this query to work.

Here is DEMO @ Sql Fiddle. You might alter schema there to provide more informations, and post a link back.