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Access 2003- Need to create Unique ID to join two tables

Posted on 2009-07-14
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Last Modified: 2013-11-29
I am trying to create a unique ID to join two tables for that will allow for cascading changes.  The unique ID will take the FIN, Antibiotic, Frequency, Date Ordered, Time Ordered and put it into a string for an id.  Or is there a better way to do this?  TblPatientAdmissions can have a person (FIN) multiple times, because a person can have more than one anitibiotic order.  The unique part would be putting together the FIN/Anitibotic/Frequency/DateOrdered/TimeOrdered (I orginally tried to make all of those fields primary since all the fields together would be unique but you could have a line with the sameFIN but different antibiotic.  I hope this makes sense, because I need to link this unique field into the tblDose.  I am not sure how to make that unique field autogenerate into the tblDose.

when database opens:

Main menu- click on Data entry
Search- use drop down on MRN field and choose the test > Click Find
View Patient Encounters- There is a button for new admission but no admission has been entered in so there will not be an option to double clik on doses.

This just gives you an idea of database, but it is the tables behind the scenes that I am trying to create the unique record.  

The form that would create this is patient admission which in the database you can just go straight to the form or test it by clicking on the "new antibiotic" button.
Private Sub cmdAdd_Click()
On Error GoTo Err_Add
    
    Dim rst As DAO.Recordset
    Dim strOpenToPatient As String
    Dim uniqueID As String 'hold the uniqueID for the record
    
    Const cPatientForm = "frmViewPatientHistory"
    
    strOpenToPatient = "MRN=""" & MRN & """"
    
 
        'set uniqueID to the generated uniqueID
    
    uniqueID = generateID(Antibotic.Value, Frequency.Value, Month(DateOrdered.Value), day(DateOrdered.Value), year(DateOrdered.Value), FIN.Value, AdmitDate.Value)
    
     'set the recordset to the admission table
     Set rst = CurrentDb.OpenRecordset("tblPatientAdmissions", dbOpenDynaset)
     
        'loop through each of the admission and add them to the recordset
        With rst '
                .AddNew 'open the addnew event to add the record details
                    ![Assessment_ID] = uniqueID
                    ![FIN] = FIN.Value
                    ![Antibiotic] = Antibiotic.Value
                    ![Frequency] = Frequency.Value
                    ![Date_Ordered] = DateOrdered.Value
                    ![Time_Ordered] = TimeOrdered.Value
                    ![AdmitDate] = AdmitDate.Value
                    ![DischargeDate] = DischargeDate.Value
                .Update 'update the record in the table
        End With
        
            If PatientFieldsFilledIn() Then
                
        DoCmd.RunCommand acCmdSaveRecord
           
        MsgBox "Patient Changes Successfully Saved"
        
        DoCmd.Close

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Question by:Namrac00
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Assisted Solution

by:MikeToole
MikeToole earned 500 total points
ID: 24860441
It seems to me that you have three categories of data

   Patient - PK: FIN
   Admission - PK: AdmissionID (autonumber), FK: PIN
   Treatment -  PK: AntibioticID, FK: AdmissionID

So there should be three tables.
The Admission table could have a PK of (FIN, Admission date/time) but these would then need to be included as a Foreigh Key in the Treatment table, it's simpler to have an Autonumber-generated
ID
   
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Author Comment

by:Namrac00
ID: 24860512
I was trying to do a autogenerator but I do not know how to have that same autonumber also update to the otherform so that I can link them
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LVL 27

Assisted Solution

by:MikeToole
MikeToole earned 500 total points
ID: 24860976
I would use standard Access form/subform support to add the new details

Main form: Patient
Sub form: Admission
Nested subform: Treatment

That way Access automatically assigns the AdmissionID whenever you add a row to the Treatment subform.

Another option would be to have the Admissions as a subform of the Patient form, then have a button to open an Admissions form for the selected admission and have the Treatments as a subform on that. Same result, just different visual style.

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Author Comment

by:Namrac00
ID: 24861766
In my database, I have a form called viewPatientHistory that shows the patient info, then it has a button to add new admissions and then there is a subform on that page that has a query of the admission info and you double click on the doses to add a dose.
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LVL 27

Assisted Solution

by:MikeToole
MikeToole earned 500 total points
ID: 24862088
Taking your 'doses' to be the same as 'Treatment' then if double-clicking on the doses navigates to a new record on the does subform, it should automatically inherit the AdmissionID (or your equivalent) from the parent form - Problem Solved!
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Author Comment

by:Namrac00
ID: 24863228
no my subform is connecting the patient to the admission
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Accepted Solution

by:
Namrac00 earned 0 total points
ID: 24865322
I was able to pull the uniqueID into the form as an open arg and then save it to the table using

assessment = txtassessment
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