Question

VBA for Creating a Calculated Column

Asked by: siva_iaf

I have table called TblData in Access with 145 Columns.
Out of these 65 Columns have a field name which contains the word   "- Amended"
Eg of these fields are "EntryDate - Amended"   ,  "BirthDate - Amended"
And the only value that is possible in any of these columns is YES

I want a VBA code to act on this existing table to create another Column named "Sum"      
which will count the number of "YES" in any of these 65 Fields and give a number in it.
If no "YES" exists in any of these fields then return a 0
Regards

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Asked On
2009-03-27 at 04:02:16ID24270592
Topics

Access Coding/Macros

,

Microsoft Access Database

,

VB Objects

Participating Experts
3
Points
500
Comments
9

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Answers

 

by: LSMConsultingPosted on 2009-03-27 at 04:16:37ID: 23999705

What Datatype is this? These should be boolean values.

Assuming you're actually wanting to do this in a Query:

AmendedSum: IIF("[EntryDate-Amended]" = True, 1,0) + IIF("[BirthDate-Amended]" = True, 1, 0) + etc etc

If in a table - that's a bad idea. You should NEVER store calculated values in a Table, since you can easily recreate the data from the "root" values.

 

by: rockiroadsPosted on 2009-03-27 at 04:20:30ID: 23999734

145 columns in one table is a bit overkill. Sounds like it might need normalising.

Regarding your question though, there might be a max size of the sql, not sure but if there is then it sounds like you may reach this.

your query would look something like this

select count(*) AS Total
from mytable
where [entrydate - amended] = true
or [birthdate - amended] = true
or ... etc list all your 65 fields

 

by: siva_iafPosted on 2009-03-27 at 04:26:49ID: 23999773

Hi LSM
These values have been stored as Text and I am wanting to do this in a VBA Query, as doing it in a query window with so much of Criteria would be impossible same is the solution given by  Rocki.
Regards

 

by: NatchiketPosted on 2009-03-27 at 04:27:09ID: 23999775

Hi siva_iaf, notwithstanding the validity of your table design, here is a solution which meets your requirements.
Unfortunately "Sum" is not a valid field name in Access (as Sum is a reserved word) so I've called it fSum

Function AddColSum()
Dim db As DAO.Database
Dim tbd As DAO.TableDef
Dim fld As DAO.Field
Dim rst As DAO.Recordset
Dim lngSumYes As Long
 
Set db = CurrentDb
Set tbd = db.TableDefs("tblData")
Set fld = tbd.CreateField("fSum", dbLong)
tbd.Fields.Append fld
db.TableDefs.Refresh
 
Set rst = db.OpenRecordset("tblData", dbOpenDynaset)
Do Until rst.EOF
    lngSumYes = 0
    For Each fld In rst.Fields
        If InStr(1, fld.Name, "Amended") > 0 Then
            If rst(fld.Name) = "Yes" Then
                lngSumYes = lngSumYes + 1
            End If
        End If
    Next
    rst.Edit
    rst!fSum = lngSumYes
    rst.Update
    
    rst.MoveNext
Loop
 
End Function

                                              
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by: siva_iafPosted on 2009-03-27 at 04:36:23ID: 23999831

Hi Natchiket:
I am getting this compile error when i am trying to execute this On a command Button...

 

by: NatchiketPosted on 2009-03-27 at 04:43:33ID: 23999857

It's because the function declaration immediately follows the sub declaration.  Delete the line 'Function AddColSum()'
Also there will be a line near the end that says 'End Function', you need to delete that too

 

by: siva_iafPosted on 2009-03-27 at 05:06:41ID: 23999917

Fantastic... Works fine..Can you just add a message on  the form like "Processing"...while it is working...

Dim db As DAO.Database
Dim tbd As DAO.TableDef
Dim fld As DAO.Field
Dim rst As DAO.Recordset
Dim lngSumYes As Long
 
Set db = CurrentDb
Set tbd = db.TableDefs("TblAfterCompare")
Set fld = tbd.CreateField("ISIS_Amends", dbLong)
tbd.Fields.Append fld
db.TableDefs.Refresh
 
Set rst = db.OpenRecordset("TblAfterCompare", dbOpenDynaset)
Do Until rst.EOF
    lngSumYes = 0
    For Each fld In rst.Fields
        If InStr(1, fld.Name, "Amended") > 0 Then
            If rst(fld.Name) = "Yes" Then
                lngSumYes = lngSumYes + 1
            End If
        End If
    Next
    rst.Edit
    rst!ISIS_Amends = lngSumYes
    rst.Update
    
    rst.MoveNext
Loop
MsgBox "Done"

                                              
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by: NatchiketPosted on 2009-03-27 at 05:13:34ID: 23999967

Now that the field has been created, attempting to add the field again causes the error.  Delete or comment out lines 8-11.  For further amendments please raise a new question

 

by: siva_iafPosted on 2009-03-27 at 05:17:14ID: 31563429

The question was solved very promptly.
Thanks

20120131-EE-VQP-002

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