Solved

MS Access  last number used +1

Posted on 2009-06-27
7
400 Views
Last Modified: 2013-11-28
When creating a record I need to assign a unique number. I do not want to use the auto number. I would like to use the last number +1. This is a multi user database and I can't have duplicate numbers. The front end is MS Access and back end in MS SQL. How would I do this?
0
Comment
Question by:seanlhall
7 Comments
 
LVL 75

Expert Comment

by:Anthony Perkins
ID: 24728347
Since you like to live dangerously do it this way:

BEGIN TRANSACTION

INSERT YourTable (UniqueNumber, Col1, Col2, ...)
SELECT MAX(UniqueNumber) + 1, 'Value1', 'Value2', ...
FROM    YourTable

COMMIT
0
 
LVL 39

Accepted Solution

by:
thenelson earned 500 total points
ID: 24728350
DMax("YourField", "YourTable") + 1
0
 
LVL 38

Expert Comment

by:Jim P.
ID: 24731389
Do you want a date serialized number. Who is keying it in? The acct exec id. A composite off the customer.

There are many ways of doing this.
0
Three Reasons Why Backup is Strategic

Backup is strategic to your business because your data is strategic to your business. Without backup, your business will fail. This white paper explains why it is vital for you to design and immediately execute a backup strategy to protect 100 percent of your data.

 

Author Comment

by:seanlhall
ID: 24731449
The starting number will be keyed in by me starting at 100. The number will be use for the case number. Example Year-100 and 09-101... I have been using the ID number of the table but if a record is deleted I lose that number.
0
 
LVL 38

Expert Comment

by:Jim P.
ID: 24731490
The problem, as I see it, is trying to keep everything in a series. The total insistence on keeping everything in series (1,2,3,4,5) without having missing numbers (1,2,3,5...) is just overwrought. It doesn't buy you anything.

In addition, are you sure you will have less than 899 cases a year? Your range is 09-100 to 09-999. What happens then.

I'm bringing up the design points now.
0
 

Author Comment

by:seanlhall
ID: 24762537
I agree that each number in series 1,2,3,4 is most likely not going to happen. The range will start at 100 and continue from there. There is not ending number. At the begin of the new year the number will return to 100.  Example 10-100.
0
 
LVL 38

Expert Comment

by:Jim P.
ID: 24762694
This function should be able to do what you want.
Public Function GetIDNum()
 
Dim DB As Database
Dim RS As Recordset
Dim SQL As String
 
 
'This is based on having a table "IdxNbrTbl" with the _
 columns "Id_Num" as a number field and "Year_Val" as _
 string/text field.
 
SQL = "SELECT Id_Num, Year_Val " & _
    "FROM IdxNbrTbl"
 
'Determine Current FY
 
Set DB = CurrentDb()
Set RS = DB.OpenRecordset(SQL)
 
With RS
    .MoveFirst
    'This will reset the value if the ID_Num (Record number) _
     back to 100 if its a new Year.
    If !FY_Val <> Year(Now()) Then
       .Edit
       !ID_Num = 100
       !FY_Val = Year(Now())
       .Update
    End If
    'If the Year hasn't changed, then this just gets the new _
     ID_Num and passes it back.
    GetIDNum = Right(!FY_Val, 2) & "-" & Format(!Idx_num, "000")
    .Edit
    !ID_Num = !ID_Num + 1
    .Update
End With
 
Set RS = Nothing
Set DB = Nothing
 
End Function

Open in new window

0

Featured Post

NAS Cloud Backup Strategies

This article explains backup scenarios when using network storage. We review the so-called “3-2-1 strategy” and summarize the methods you can use to send NAS data to the cloud

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction The Visual Basic for Applications (VBA) language is at the heart of every application that you write. It is your key to taking Access beyond the world of wizards into a world where anything is possible. This article introduces you to…
A simple tool to export all objects of two Access files as text and compare it with Meld, a free diff tool.
Familiarize people with the process of utilizing SQL Server views from within Microsoft Access. Microsoft Access is a very powerful client/server development tool. One of the SQL Server objects that you can interact with from within Microsoft Access…
Familiarize people with the process of utilizing SQL Server stored procedures from within Microsoft Access. Microsoft Access is a very powerful client/server development tool. One of the SQL Server objects that you can interact with from within Micr…

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question