You could create a query along the lines of:
SELECT responseID, pptID, questionnaireID,
interviewDate,
DateDiff("yyyy", tblParticpants.DOB, tblResponses.interviewDate) -
IIf(Format(tblResponses.interviewDate, "mmdd") < Format(tblParticipants.DOB,
"mmdd"), 1, 0) AS Age,
interviewLanguage, interviewerID, ...
FROM tblResponses INNER JOIN tblParticipants
ON tblResponses.pptID = tblParticipants.pptID
WHERE questionnaireID = 5
UNION
SELECT responseID, pptID, questionnaireID,
interviewDate,
Null,
interviewLanguage, interviewerID, ...
FROM tblResponses
WHERE questionnaireID <> 5
What this would do is give you an additional field Age that would only be
populated for Question 5.
You'd then be able to use that query anywhere you would otherwise have used
tblResponses.
--
Doug Steele, Microsoft Access MVP
http://I.Am/DougSteele
(no private e-mails, please)
"dee" <(E-Mail Removed)> wrote in message
news:F16EB37B-F74B-4128-BAF8-(E-Mail Removed)...
> Thanks for your response. I'm sorry, I thought I had provided enough
> information.
>
> I guess where I am having difficulty is referencing the Interview Date
> field
> in another table. I'll try to be more clear:
>
> tblParticipants
> pptID (autonumber PK)
> First
> Last
> DOB
> etc.
>
> tblResponses
> responseID (autonumber PK)
> pptID (fk)
> questionnaireID (fk) (there are several questionnaires)
> interviewDate
> interviewLanguage
> interviewerID (fk)
> etc.
>
> I need to determine the Age of the participant as of the (tblResponses)
> interviewDate of questionnaireID **5** only, putting the result in the
> tblParticipants.
>
> I realize that this is unusual, but for historical purposes only, plus the
> fact that the data will be exported to a statistical package that requires
> this field, it's really the only choice I have.
>
> Thanks so much for your help - I hope I have provided enough detail.
>
>
>
> --
> Thanks!
>
> Dee
>
>
> "Douglas J. Steele" wrote:
>
>> You haven't really given us much to go on, but to calculate age at a
>> particular date in time, you'd use
>>
>> DateDiff("yyyy", [DOB], [SpecificDate]) - _
>> IIf(Format([SpecificeDate], "mmdd") < Format([DOB], "mmdd"), 1, 0)
>>
>> In general, you shouldn't store ages. I suppose that since this
>> particular
>> age will never change, it might be okay to store it instead of the DOB.
>>
>> --
>> Doug Steele, Microsoft Access MVP
>> http://I.Am/DougSteele
>> (no private e-mails, please)
>>
>>
>> "dee" <(E-Mail Removed)> wrote in message
>> news:9720D132-2C29-4E01-92A4-(E-Mail Removed)...
>> >I have a DOB field in table1 and an Age field in table1 as well.
>> >
>> > In table2, I have a field that contains a date that respondents
>> > answered
>> > specific questionnaires.
>> >
>> > For historical purposes, I would like to capture the age of the person
>> > at
>> > the time one questionnaire in particular was answered in the Age field
>> > of
>> > table1.
>> >
>> > I'm not sure how to go about this, especially since I need the
>> > questionnaire
>> > date to be for a specific questionnaire, i.e. questionnaireID 05
>> > specifically.
>> >
>> > I have searched high and low and can't seem to find anything like this.
>> > Any
>> > help would be greatly appreciated!
>> > --
>> > Thanks!
>> >
>> > Dee
>>
>>
>>