Question

Form to update Junction Table

Asked by: schmir1

I'm looking for an example of how to use a form to update a junction table (for many to many relationship).  I'm struggling with getting the junction table updated.

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Asked On
2009-09-15 at 13:26:22ID24734353
Topic

Access Forms

Participating Experts
2
Points
500
Comments
7

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Answers

 

by: sb9Posted on 2009-09-15 at 13:44:36ID: 25339265

 

by: boag2000Posted on 2009-09-16 at 01:10:23ID: 25343051

<how to use a form to update a junction table >
Can you give us any details about this "mysterious" junction table?
What is it related to?
It fields?
It's Keys?

<I'm struggling with getting the junction table updated.>
Struggling in what way?
Please be specific.

A junction table should contain the Keys from both "One" tables.
All that you need to do is fill in the values.
So you may need some comboboxes, ...but it should be as easy a creating a form from the table and filling it in.

There is a great example of a Form for a Junction table in the Northwind sample Database, it is called "Orders Subform".

JeffCoachman

 

by: schmir1Posted on 2009-09-16 at 09:14:17ID: 25347232

sb9:
  I found an example on the web site but not at the links you provided.  Thanks for getting me to the web site.  They got lots of stuff.

Boag2000:
  I didn't see a junction table on Orders Subform.  What is called?

 

by: boag2000Posted on 2009-09-16 at 12:26:26ID: 25349148

You don't "See" a junction table on a form.

The Junction Table is basically the Forms RecordSource.

The RecordSource for the form is a query that uses the Junction Table named: "Order Details"

You can take hints from this table, query, and form, to build your own form.

JeffCoachman

 

by: schmir1Posted on 2009-09-16 at 13:01:57ID: 25349498

Sorry, I didn't ask that question very well and I didn't take the time to understand the db struction.  I can see it now.

Both those examples showed me what I needed.  I was trying to use both sides of the junction where I only needed one side.  Also, I didn't have the control source set correctly (junction table) and a few other things where wrong.  It's working now and thans for both your help.

 

by: schmir1Posted on 2009-09-16 at 13:03:24ID: 31629139

 Excellent examples of implementing many-to-many relationships.

 

by: boag2000Posted on 2009-09-16 at 13:51:41ID: 25349986

;-)

Yes, this is sometimes confusing trying to figure out what fields from what table should be in the query.

;-)

20120131-EE-VQP-002

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