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DCount syntax with inner join

Posted on 2013-11-13
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Last Modified: 2013-11-13
I have the following working in a listbox's rowsource, I would like to modify to a DCount.

SELECT Count(*) AS CountOfDOS FROM TPatient LEFT JOIN TClaim ON TPatient.ID=TClaim.ID WHERE TPatient.ID=Forms!FPatientEntryQuery!ID And TClaim.ActiveClaim=True And [DOS]<DateAdd("d",-60,Date());

I am having issues with the quotes.  Can a Dcount be performed as this?  If so what would the proper syntax be?
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Question by:thandel
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3 Comments
 
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Accepted Solution

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chaau earned 500 total points
ID: 39647043
You will need to create a query that joins TPatient and TClaim.

1. Create a query with this SQL syntax. Call it QPatientClaims:
SELECT TPatient.ID AS PatientID, TClaim.ActiveClaim, [DOS] FROM TPatient LEFT JOIN TClaim ON TPatient.ID=TClaim.ID;

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2. Your DCount syntax will be:
DCount("*", "QPatientClaims", "PatientID=" & CStr(Forms!FPatientEntryQuery!ID) & " And ActiveClaim=True And [DOS]<DateAdd(""d"",-60,Date())")

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Author Closing Comment

by:thandel
ID: 39647058
Thank you.
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LVL 29

Expert Comment

by:IrogSinta
ID: 39647069
An alternative to DCount:

Dim iCnt as integer

iCnt = CurrentDb.OpenRecordset("SELECT Count(*) AS CountOfDOS FROM TPatient LEFT JOIN TClaim ON TPatient.ID=TClaim.ID WHERE TPatient.ID=Forms!FPatientEntryQuery!ID And TClaim.ActiveClaim=True And [DOS]<DateAdd('d',-60,Date())").Field(0)
Msgbox iCnt

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Or you could use the specify the rowsource of your control (although it seems unusual that that your listbox rowsource only returns a single row showing the count).
iCnt = CurrentDb.OpenRecordset(Me.Listbox.Rowsource).Field(0)

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Ron
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