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Count the number of rows in a query result set

Posted on 2008-06-16
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Last Modified: 2013-11-27
I have a procedure that, depending on whether the query returns 0 rows it must do something and if it returns 1 or more, do something else.  So, how so I simply count the number of rows in a query?  I need to count the number or rows in qryPauseDurations first, if 0, then I only want to run the one query in the ElseIf portion.
Private Sub RunDurations()
'Runs queries to calculate durations
If RowCount >= 1 Then
 
        DoCmd.OpenQuery "qryPauseDurations", acViewNormal 'Need to    count number of rows in this query
 
        DoCmd.OpenQuery "qryStepDurations", acViewNormal
        DoCmd.OpenQuery "qryTaskDurations", acViewNormal
        DoCmd.OpenQuery "qryUpdatePauseStepDurations", acViewNormal
        DoCmd.Close acQuery, "qryPauseDurations"
        DoCmd.Close acQuery, "qryStepDurations"
        DoCmd.Close acQuery, "qryTaskDurations"
        DoCmd.Close acQuery, "qryUpdatePauseStepDurations"
ElseIf RowCount = 0 Then
        DoCmd.OpenQuery "qryUpdateStepOnly", acViewNormal
End If
End Sub

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Question by:ssmith94015
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9 Comments
 
LVL 75
ID: 21797183
If DCount("*", "qryPauseDurations") = 0  then

0
 
LVL 75
ID: 21797196
Private Sub RunDurations()
'Runs queries to calculate durations
If DCount("*", "qryPauseDurations") >= 0  then
 
        DoCmd.OpenQuery "qryPauseDurations", acViewNormal 'Need to    count number of rows in this query
 
        DoCmd.OpenQuery "qryStepDurations", acViewNormal
        DoCmd.OpenQuery "qryTaskDurations", acViewNormal
        DoCmd.OpenQuery "qryUpdatePauseStepDurations", acViewNormal
        DoCmd.Close acQuery, "qryPauseDurations"
        DoCmd.Close acQuery, "qryStepDurations"
        DoCmd.Close acQuery, "qryTaskDurations"
        DoCmd.Close acQuery, "qryUpdatePauseStepDurations"
Else
        DoCmd.OpenQuery "qryUpdateStepOnly", acViewNormal
End If
End Sub
0
 
LVL 75
ID: 21797211
And you won't need this:

        DoCmd.OpenQuery "qryPauseDurations", acViewNormal 'Need to    count number of rows in this query

unless you really want to open also ??

Private Sub RunDurations()
'Runs queries to calculate durations
If DCount("*", "qryPauseDurations") >= 0  then
         DoCmd.OpenQuery "qryStepDurations", acViewNormal
        DoCmd.OpenQuery "qryTaskDurations", acViewNormal
        DoCmd.OpenQuery "qryUpdatePauseStepDurations", acViewNormal
        DoCmd.Close acQuery, "qryPauseDurations"
        DoCmd.Close acQuery, "qryStepDurations"
        DoCmd.Close acQuery, "qryTaskDurations"
        DoCmd.Close acQuery, "qryUpdatePauseStepDurations"
Else
        DoCmd.OpenQuery "qryUpdateStepOnly", acViewNormal
End If
End Sub
0
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Author Comment

by:ssmith94015
ID: 21797335
No, don't care to open, be right back.
0
 
LVL 75

Accepted Solution

by:
DatabaseMX (Joe Anderson - Microsoft MVP, Access and Data Platform) earned 500 total points
ID: 21797359
***I made a TYPO ***

Private Sub RunDurations()
'Runs queries to calculate durations
If DCount("*", "qryPauseDurations") > 0  then                                     '   ** HAD TYPO HERE >=0
         DoCmd.OpenQuery "qryStepDurations", acViewNormal
        DoCmd.OpenQuery "qryTaskDurations", acViewNormal
        DoCmd.OpenQuery "qryUpdatePauseStepDurations", acViewNormal
        DoCmd.Close acQuery, "qryPauseDurations"
        DoCmd.Close acQuery, "qryStepDurations"
        DoCmd.Close acQuery, "qryTaskDurations"
        DoCmd.Close acQuery, "qryUpdatePauseStepDurations"
Else
        DoCmd.OpenQuery "qryUpdateStepOnly", acViewNormal
End If
End Sub
0
 

Author Comment

by:ssmith94015
ID: 21797406
Ok, it recorgnized if it i 1 or more and runs the first if code.  However, it simply does not recognize what to do if there are 0 rows.  Let me check the query for that first.....
0
 
LVL 75
ID: 21797434
I had a typo - see my correction above  @ http:#a21797359
0
 

Author Comment

by:ssmith94015
ID: 21797545
Thanks DatabaseMX, it seems to be working.
0
 
LVL 75
ID: 21797562
you are welcome.  sorry for the typo confusion ...

mx
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