Solved

Transaction Log in Access Database

Posted on 2016-08-16
14
30 Views
Last Modified: 2016-09-06
We are looking for a way to create a transaction log in Access 2010, when changes are made in a table, this transaction log populates when the change was made. We want a record created in a transaction log to keep track of any changes in a table. Specifically, we have a table with multiple columns that have check boxes (Columns 1-5 on the attached image). We are looking for a way to track when those check boxes are checked. On our table that has multiple columns with check boxes (Table 1), there is an ID column. On the transaction log, we need it to reference the ID column from the table (Table 1) and which column was checked (Columns 1-5). I hope that makes sense. Thanks!!
Example.jpg
0
Comment
Question by:brasiman
  • 4
  • 4
  • 2
  • +3
14 Comments
 
LVL 28

Expert Comment

by:omgang
Comment Utility
Are you changing the data directly in the table or are you doing the changes via a form?  Access doesn't have table triggers like SQL server.

OM Gang
0
 
LVL 22

Expert Comment

by:Kelvin Sparks
Comment Utility
If you are updating using bound forms, you can use the forms before update event to trap the New value and Old value and write them to a log. You'd need to write a piece of code that cycles all the appropriate controls and compares the oldvalue and value values and write where they're different along with any other data you want.


Kelvin
0
 

Author Comment

by:brasiman
Comment Utility
We will be changing the data in a form, which is tied to the table.
0
 
LVL 22

Expert Comment

by:Kelvin Sparks
Comment Utility
If you are updating directly into the table, or use unbound forms, then sadly, you're out of luck


Kelvin
0
 

Author Comment

by:brasiman
Comment Utility
0
 
LVL 22

Expert Comment

by:Kelvin Sparks
Comment Utility
Forms tied to the table are bound forms.

K
0
 

Author Comment

by:brasiman
Comment Utility
I can change it so we are entering the data on the table.
0
How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

 
LVL 3

Expert Comment

by:bfuchs
Comment Utility
I have the following function that does that, just call it from the forms BeforeUpdate event.
Public Function SaveHistoryChanges(Optional sTable As String = "", Optional sField As String = "", Optional vValue As Variant = "", Optional lID As Long = 0)
    Dim ssql As String, cNtrl As Control
    If Len(sTable) = 0 Then sTable = Screen.ActiveForm.Name
    If lID = 0 Then lID = Nz(Screen.ActiveForm.ID, 0)
    
    On Error Resume Next
    For Each cNtrl In Screen.ActiveForm.Controls
        If (TypeOf cNtrl Is TextBox Or TypeOf cNtrl Is ComboBox Or TypeOf cNtrl Is CheckBox Or cNtrl.ControlType = 107) Then
            If Nz(cNtrl.Value) <> Nz(cNtrl.OldValue) And cNtrl.Visible = True And cNtrl.Enabled = True Then
                If Not IsNull(cNtrl.OldValue) And Not (TypeOf cNtrl Is CheckBox) Then
                    If Nz(tLookup("ID", "HistoryChanges", "TableName = '" & sTable & "' and FieldName = '" & cNtrl.ControlSource & "' and TableID = " & lID), 0) = 0 Then
                        ssql = "Insert into HistoryChanges (TableName, FieldName, Value, TableID)"
                        ssql = ssql & " Values ('" & sTable & "','" & cNtrl.ControlSource & "','" & cNtrl.OldValue & "'," & lID & ")"
                        CurrentProject.Connection.Execute ssql
                    End If
                End If
                ssql = "Insert into HistoryChanges (TableName, FieldName, Value, Initial, TableID)"
                ssql = ssql & " Values ('" & sTable & "','" & cNtrl.ControlSource & "','" & cNtrl.Value & "','" & GetInitial & "'," & lID & ")"
                CurrentProject.Connection.Execute ssql
                
            End If
        End If
    Next

End Function

Open in new window

0
 
LVL 22

Expert Comment

by:Kelvin Sparks
Comment Utility
"I can change it so we are entering the data on the table. "

No!, you must use bound forms!

K

The code above is just what is needed.
0
 
LVL 57

Accepted Solution

by:
Jim Dettman (Microsoft MVP/ EE MVE) earned 500 total points (awarded by participants)
Comment Utility
Access 2010 does have data macros attached to tables, which are like triggers in SQL and other db's.   Only requires that you use the new ace format.

You can also do it through bound forms as has been suggested.  Here is a complete solution:

http://allenbrowne.com/appaudit.html

Jim
0
 
LVL 75

Expert Comment

by:DatabaseMX (Joe Anderson - Access MVP)
Comment Utility
Yes as Jim notes, you can use Data Macros if you are using the ACCDB format. I've tested this and created a transaction log and it seems to work quite well.  Just an FYI.
0
 

Author Comment

by:brasiman
Comment Utility
Hi bfuchs, do I need to change any of the code text to match my columns and table name? On my first question, I attached an image of my table and column names. Thanks!
0
 
LVL 3

Expert Comment

by:bfuchs
Comment Utility
No, the only thing needed is to create a table named HistoryChanges with the following fields.
 TableName, FieldName, Value, Initial, TableID
0
 
LVL 75

Expert Comment

by:DatabaseMX (Joe Anderson - Access MVP)
Comment Utility
Abandon Q
0

Featured Post

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

In a multiple monitor setup, if you don't want to use AutoCenter to position your popup forms, you have a problem: where will they appear?  Sometimes you may have an additional problem: where the devil did they go?  If you last had a popup form open…
This code takes an Excel list of URL’s and adds a header titled “URL List”. It then searches through all URL’s in column “A”, looking for duplicates. When a duplicate is found, it is moved to the top of the list. The duplicate URL’s are then highlig…
As developers, we are not limited to the functions provided by the VBA language. In addition, we can call the functions that are part of the Windows operating system. These functions are part of the Windows API (Application Programming Interface). U…
In Microsoft Access, learn how to use Dlookup and other domain aggregate functions and one method of specifying a string value within a string. Specify the first argument, which is the expression to be returned: Specify the second argument, which …

763 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

Need Help in Real-Time?

Connect with top rated Experts

6 Experts available now in Live!

Get 1:1 Help Now