Form Design Strategy On Schema With Many M-M Relationships

Nov 4, 2005

Hello,

I have a couple of elementar level questions on Form creation process and standards invloving a schema with several M-M relationships. I have a highly normalized design (thereby producing several junction tables). I have attached a picture of my schema to give an ideal of the schema I am talking about.

1. What is typcially the process of creating Forms on such a schema for the purpose of data-entry. Meaning, should there be several Forms (on the order of # of tables) or should there be a few that enables simulataneous data entry to many tables through one Form. What is typically the practise?

2. If there are 3 tables (A, B, C) so that A and C have a M-M relationship and B is a junction table that makes A &B and A & C have a 1 - M relationship, then how does one enter data for A, B, and C so that all the three get populated?

3. Can someone provide a copy or link to a sample database that has a similar normalized schema and Forms built into it that takes care of the data entry to the various tables?

Thank you very much for some light on this path.

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Help With Relationships And Table Design:

Jan 11, 2005

Hi all! Here is what I want to do, and what I have done so far:

I have one table called "AUTOS" This is a table imported from pc file, and tweaked to make it work well in Access. I learned alot doing this, and now have workable forms, queries, and reports being generated on this table. I learned on here not to let my users "work" with the table, only through forms. So that all works very nicely!

Here is the next step. First a simple background: We are a Used car dealer. Table "AUTOS" contains rows, each one consisting of many Fields. The main one being "Stock NO". Then all the remaining fields are vehicle info (many fields, but all relating to the vehicle type etc), cost, sales price, etc.

What I want to do is create a new table, called RECONDITIONING. In this table I want to store everything done to a vehicle after purchase. For example, if we purchase a vehicle, then change the oil, put on new tires, and detail it, I want these items in the reconditioning table. But I want them to remain linked to the "correct" stock number in the main table.

I believe I have done this, by doing this: I created a second table called reconditioning. Added the fields I wanted, the first one being "Stock NO". I made "Stock NO" in the main table autos the primary key, and then opened relationships, and linked the reconditioning table to the main table via that field.

It appears to have done what I wanted too, because if I open the reconditioning table, and type in a vehicles stock no, then the reconditioning info, then go back to the main table, there is now a + next to the row. If I click this plus, a box drops down with each item I added to the reconditioning table. So far so good!

Here is the main question: Now that I have this info in what seems like the proper fashion, how do I work with it?

I need to create a form, containing elements from EACH table. The design I have in mind is like this:

Across the top, I want vehicle info:

Stock No Year Make Model Date In Cost
5922 1994 Ford Focus 1/1/05 1000.00

Then under that, I want a "table" in a form, which pulls from my "reconditioning" table, listing each item that has a stock No that matches the one on that record:

5922 Replaced Windsheild Wipers 1/8/05 20.00
5922 Tuned Up 1/10/05 75.00


Ok, now, I want to allow my users to add to that on this form, to type in new entrys. I think I got the idea how to do that, but suggestions are welcome. Now, on this form, I want at the bottom, the following:

Vehicle Notes: (Just a text field for "notes" on a particular vehicle)

Total Reconditioning cost: (this is a field on the FIRST table, AUTOS, that I want to calculate by adding the total from the list above, IE in this case, 95.00)

Total_ACV: This is a field from the first table as well, which I want to calculate using (Vehicle cost: Which is in the first table)+(Total Reconditioning Cost: which is above)

Like I said, I think I have the table layout and design correct, I am just not sure of how to work with values in linked tables like I have done, and I am not sure get the right info in my list on the form, then add the totals properly.

Any suggestions are appreciated!

Bill

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Hi Guys, thought i would pick your brains to try and help me figure out how to build this database. Any help would be very much appreciated as this one is making my head spin.

Brief::

I need to create a database that will hold information about our suppliers and the products that they stock and make.

One supplier can have a number of contacts that we speak to.
The supplier produces a number of different products.
Each of the suppliers stock certain items in certain sizes and weights and make the remainder of their stock to order, so each supplier has a number of different supply options. So in addition to the multiple supply options their are multiple sizes & weights, as well as multiple qualities.

dont know if this helps people to understand buit the products we are talking about is paper (sheets or paper & reels of paper)

example.

Joe BLoggs (Supplier) has 3 sales members (Louise, Maggie, Sue) this supplier holds some sheets and some reels in stock (Stock Sheets, Stock Reels) but they also make sheets of any size and weight between a certain range as well as reels (Bespoke Reels, Bespoke Sheets). These sheets and reels can be of different qualities (gloss, silk, offset). These different qualities can have a number of different grades (Manhattan, Triumph, Charter) and will be available in a number of different weights (70gsm, 115gsm, 150gsm).

The idea behind creating the database is to allow the sales team to query the database to find a supplier that can match the customers criteria.

I have created the following database tables

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SupplierName
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Address2
Address3
Address4
PostCode
Tel
Fax
Web
Email

tblContacts
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FirstName
LastName
Tel
Email

tblStockingOptions
OptionID (PK)
BespokeSheets
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StockSheets
StockReels

TblQualities
QualityID (PK)
PaperQuality

tblWeights
WeightID (PK)
Gsm

tblPaperInfo
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SupplierPaperName
OurName
PaperInfo

Do these tables look aabout right???? Now comes the bit thats making my head spin Relations, can someone please give me some advice on this.

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hey.. I’m a complete newbie at designing tables and relationships, so pls bear with me..

Im trying to construct a db that records all the details for an importing company.

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Also, im having some major probs with my variables and forms… the P/C No in the Shipping Table is the most important value here. This number is used repeatedly throughout the process. Problem I’m having is that this number needs to be alphanumeric, and also get passed to each other table (hence P/C No as a fk in each other table). How can I do this? Ive been playing around with loads of diff relationships but with no luck. I ideally need this alphanumeric number, when entered in the first form, to be ‘sent’ to other forms, as I chose. How can I do this?

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snowman

ps - sorry for such a long post!

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