Query To Track Revision History

Dec 28, 2007

I would like to track the revision history of table records. To do so, I have created tables with two-key fields. A typical table is tblPO_Data. The first key field is PO_Number and the second key field is PO_Revision. Data fields follow.

A key element of this table is that each record may have any number of data fields left blank AND later revisions may only show the "changed" field values.

To Illustrate tblPO_Data:

PO_Number PO_Revision Length Width Height Weight Quant UPrice
100 _________0___________10_____15___________________2 ____20
200 _________0_______________________________________1 ____10

NOW I would like to create a query that lists one record for each PO number, showing the most recently revised data. The desired result would look like:

PO_Number PO_Revision Length Width Height Weight Quant UPrice
100_____________2_______10_____15_____35_____100__ ___2____20
200_____________0_________________________________ ___1____10

Please realize that this is an example. There would be numerous one to one tables for each PO number to reduce the number of blank fields (ie. only tables with changes would be get revised records).

Can someone suggest a way to create a query to accomplish the above requirements, thanks in advance, Jeff...

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Modules & VBA :: Parent Table Revision History - Insert Multiple Records Into Child Table

Sep 8, 2014

I have a parent table (tblLabels) and a child table (tblRevision) where the revision history for the parent table is kept.

The parent table is populated via an excel import and may have several records imported at once. Instead of having the user manually enter a new record note in the child table for each record imported into the parent table, I've created a form that collects the necessary data (date, person who added the record, person who authorized the record, and notes) and then creates a revision history for each new record.

This is what I have so far:


Private Sub cmdAddNotes_Click()
Dim strSQL As String
Dim RevisionDate As String
Dim RevisionRevisedBy As String
Dim RevisionDesc As String

[Code] ....

When I run the code nothing happens. No error, no new records create, etc. My suspicion is that I may need to use an INSERT INTO query instead of an UPDATE query, but I'm not sure how to go about matching up the foreign keys if that's the case.

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Jun 29, 2005

Good afternoon,
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Thank you,


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I currently have a number of excel tables:

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Name En Ma Subj1 Subj2 Subj3 Subj4

Revision details Table

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I would like to produce something like this for each student:

In week 1

Mon EnTask1 Subj1Task1 MaTask1
Tue SubjTask1 Subj2Task2 EnTask1 etc

But I am stuck with the query and the reports.

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I have 2 fields - "Balance" and "Date" - each time data in the "balance" field changes, the "Date" field updates to todays date (thanks to help from Kiwiman in the forum earlier).

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In MS Access, form

I want make like this:

1st time:
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2nd time:
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3rd time:
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4th time:
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What is the keyword to search about it in the forum?
Anyway, does anybody know how to solve it?
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I'm building a history table to keep track of some changes that occur on one of my forms.
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Dim rs As DAO.Recordset
Set rs = CurrentDb.OpenRecordset("tblDateCycleTestingChanges", dbOpenDynaset)
With rs
![CycleTestingDatesID] = Me.CycleTestingDatesID.Value
![Changed] = Now()
![ClientID] = Me.ClientID.Value
![ProjectID] = Me.ProjectID.Value
![TaskID] = Me.TaskID.Value
![TaskStartDt] = Me.TaskStartDt.Value
![TaskEndDt] = Me.TaskEndDt.Value
End With
Set rs = Nothing
End If
I have 2 questions:
1. I'm not sure where to insert this event. I'm thinking on Before_Update on the updated field? (I don't want to put it into Before_Update for a form event as I have other things that are being filled out/changed and I only want to keep track if certain fields on the forms are updated/changed.
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Hi, I'm new to the forum.

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