VBA to increment all records in a table by 1

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rblaustein@gmail.com - 01 Nov 2006 17:56 GMT

I am trying to write a VBA procedure to increment an entire table by a
value of 1 when a user clicks on a button of a form (or selects from a
custom menu). The table, called tblStudents contains student ID's,
names, etc. and their grade level (e.g.- 10). The user has requested
for this functionality to be built so that he/she can click the button
at the end of each school year, and thus update the entire table with
the new grade levels. Any ideas on the best way to do this???

This is what I tried thus far, but to no avail...
Private Sub btnUpdateGradeLevel_Click()
Dim RecordQty As Integer
Dim RecordCounter As Integer
DoCmd.OpenTable "tblStudents", acViewNormal, acEdit
RecordQty = DCount("Grade", "tblStudents")
DoCmd.GoToRecord acDataTable, "tblStudents", acFirst

For RecordCounter = 1 To RecordQty
DoCmd.GoToRecord acDataTable, "tblStudents", acGoTo,
RecordCounter
Grade = Grade + 1
Next

DoCmd.Close acTable, "tblStudents", acSaveYes
End Sub

This code only updates the first record - but by the total number of
records in the table. In other words, if John Smith is the first
record of 1000 total records, and he is in grade 10, it updates his
record to be in grade 1010, and none of the other records are changed
at all.

Any help is greatly appreciated!!! Thanks!

Reply to this Message

Roger Carlson - 01 Nov 2006 18:28 GMT

There are several solutions, but I'll give you two just to illustrate some
techniques:

1. Using ADO (ActiveX Data Objects)

Sub btnUpdateGradeLevel_Click()
Dim conn As ADODB.Connection
Dim rs As New ADODB.Recordset
'Open a recordset on the table.
Set conn = CurrentProject.Connection
rs.Open "tblStudents", conn, adOpenKeyset, adLockOptimistic
Do While Not rs.EOF
rs!Grade= rs!Grade+ 1
rs.MoveNext
Loop
End Sub

2. Using Embedded SQL Update Query:

Sub btnUpdateGradeLevel_Click()
Dim conn As ADODB.Connection
Dim strSQL As String
Set conn = CurrentProject.Connection
strSQL = "UPDATE tblStudents SET Grade= [Grade]+1;"
conn.Execute strSQL
End Sub

Signature

--Roger Carlson
MS Access MVP
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> I am trying to write a VBA procedure to increment an entire table by a
> value of 1 when a user clicks on a button of a form (or selects from a
[quoted text clipped - 28 lines]
>
> Any help is greatly appreciated!!! Thanks!

Reply to this Message

Klatuu - 01 Nov 2006 19:10 GMT

Roger's response is very good; however, it assumes you are using a ADP. If
you are using an mdb, the easiest method would be:

CurrentDb.Execute("UPDATE tblStudents SET Grade= [Grade]+1;"),
dbFailOnError

Reply to this Message

rblaustein@gmail.com - 01 Nov 2006 20:11 GMT

Thank you both so much!!! I tried all three options (definetely helps
w/ the learning process to understand the different ways to attack the
problem), and each one worked perfectly.

Thanks again - very much appreciated.

Reply to this Message

Roger Carlson - 01 Nov 2006 21:09 GMT

While the example you gave is undoubted easier, both of mine will work in
MDBs in Access 2000 and higher.

Just don't want anyone to misunderstand.

Signature

> Roger's response is very good; however, it assumes you are using a ADP. If
> you are using an mdb, the easiest method would be:
[quoted text clipped - 34 lines]
> >
> > Any help is greatly appreciated!!! Thanks!

Reply to this Message