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How to best handle updating field in another table when check box is true

I have a database where each submission will have multiple associated samples.  There is a check box to mark the submission closed when work is completed on it.  I also need to update the "completed" field for each sample associated with the submission.  I would like to do this automatically when the check box is "true" and undo it if the user makes an error and later unchecks the box.  Submissions and samples are two different tables related by Submission ID.  I have an update query to update in bulk all the samples that have been missed so far but I'm not sure that is the way to handle the day to day updates.  I'm also not sure how to run the update query in a silent mode that the user doesn't see.  Maybe VBA, macro or something else would  be better?  Any suggestions on the best way to handle it?
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2 Solutions
Here is a way:

Table a (aid string - key, f1 integer)
Code in Check43 After Update event.
If true update f1 to a value, otherwise update to another.

Private Sub Check43_AfterUpdate()
    DoCmd.SetWarnings False
    DoCmd.RunCommand acCmdSaveRecord
    If Check43 Then
        DoCmd.RunSQL "update a set f1=5 where aid='" & Me.aID & "'"
        DoCmd.RunSQL "update a set f1=6 where aid='" & Me.aID & "'"
    End If
    DoCmd.SetWarnings True
End Sub

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Some unsolicited design advice.   If you have to run a bulk update to set and unset a bunch of values, the field is in the wrong table.  You need the checkbox to be in a higher level table so you only check one box on a form.
esbyrtAuthor Commented:
Thank you hnasr for that bit of code, I'm sure I will use it somewhere.  However,  PatHartman gave me an AHA! moment with his comment.  I don't need to have a "completed" field for the samples when I can just run a query on the samples and filter the results by completed or not completed submissions.
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