Tables :: Frontend Table Relationships Different Than Backend?
May 28, 2014
I created a database a few years ago and it has been working well. This database is split.
Recently I started to update the front end based on user feedback and I am adding some queries.
I am noticing that sometimes I try to create a new query and Access tells me that the tables that are involved in the query are not related. Sure enough if I check in the front end, the table relationships are not the same as those in the back end and while the table relationships I need exist in the back end, they do not in the front end.
While the relationships were initially created in the unsplit database, it is possible that I added some of them later during past development/updating processes when the database was already split. This is the only reason I can think of for them to be different.
When I add a relationship in the back end (new table or bug fix) do I also need to add it to the front end if the database is split? if not, why would they be different? What kind of issues can this create?
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Apr 2, 2007
I am evaluating a program for the use of a customer. It's a VB frontend attached to an Access database.
The backend has no relationships. No table in the backend even has a primary key.
My question: Is this scenario acceptable in any way?
I tend to think not, but am unsure whether the design of the frontend application establishes relationships "on the fly". Even if so, the fact that there are no primary keys makes me think I should dismiss this application out of hand.
Thanks
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Jun 24, 2005
I have created a form that I want to share with other people. They will never add or change any of the data - they will only use the form as an information source. I need to be able to access the database to add/change information.
What is the best way to do this?
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Dec 10, 2004
Hi Experts,
I am trying to develop a multiuser database. I heard that in a multiuser setup the back end should be on the network and front end on the users machines. Could anyone please explain what is these back end front ends and how should I set it up.
And one more (silly) question... Do we really need MS Access to be installed in the users machines in order to do this?
Any help is appretiated..
Thanks,
binjos
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Dec 8, 2005
I have a database split with a frontend (FE) and backend (BE). Both reside on our network. I give a copy of the FE to all users. The FE is linked to itself so if I make a change to the network copy the next time a user opens theirs it tells them to close down and it recopies itself. This works really good. The problem we're having is people going and making a shortcut to the networked FE. So WHENEVER they open their FE everyone gets a message saying to close and recopy. The database is about 10mb but for someone across with a slow intranet connection it can take a bit to download. I'm looking ways to prevent users from accessing the networked FE. Can you simply hide it?
Thanks,
DT
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Jan 31, 2006
Hi!
I´ve just made a frontend backend solution with a db i Access2002.
I made this because my users 5 persons have a booking system wich they use at tehe same time.
But the db locks all the time... I thougt we would get rid of that problem now.
Is there something I have to check?
I have some lookup tables, can this cause this kind of trouble?
Jack
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Apr 18, 2007
A simple personal database created by me is to be deployed on a home network having two PCs. I did splitting to FE and BE. The BE shows only tables. I would like to have the guidance of experts in this forum for the following:
1. Whether BE to be copied first in the host PC?
2. FE to be copied in the other PC?
3. After copying the Access DB how to link FE and BE between the two PCs?
4. Whether data entry, edit, search etc. possible from both the PCs?
5. If I test with dummy records, how do I delete dummy records, from BE or FE?
Shall be grateful for help.
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Feb 3, 2008
At work i have a newtwork of computers each with a frontend of my database on it and 1 computer with the backend on it, once there's about 8-10 computers using it, it wont let anymore in it saying something like unable to open, exculsively opened etc. How to i get round this?
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Nov 18, 2012
I am very good at excel and can program macros. I am being asked to build something in access for my company, or at least manage a build. So here is my question... If we build it without both a front and back end, is it easier to take what you have and switch it to a front and back end? Also, when and why is it better?
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Nov 2, 2006
Hi,
I'm wondering about the following.
If I would have a backend table with the data kept in tables and a frontend database with forms and reports and queries etc. and linked tables to the backend db, what would be the right way to secure both.
In my situation I have salary information in some of the tables, which should not be wide open to the holy world. I also need to restrict the access of some queries and forms in the frontend database to different users. That means I need to set up a secured frontend database with different usergroups having different object permissions. So in that frontend database the Users Group and the Admin User do not have any permissions any more. Thats why I created a shortcut where I kept the database and workgroup information in the target. Every user needs to open the database via the shortcut.
Unfortunately I was not able to secure both the backend and the frontend database, because the linked tables in the frontend db are only pointing to a database not to a shortcut. Because the backend database is secured as well (no permission to Admin and Users any more) it can't be opened directly - only by shortcut.
Am I right that there is obviously no possibility to have a secured backend and frontend db via the Jet database engine and Access?
I hope somebody can answer my questions. At least I know that I can't do anything else and I did not something wrong ;)
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Jun 26, 2007
Wondering if anyone had tried this yet, and if so, encountered any problems. I have a few existing DB's in the office. Split with backend on server in mdb format. I am now using both 2003 and 2007... BUT.. Now that the runtime is out I would like to make my future updates in 2007. So the question is... Has anyone used a 2007 file format frontend with a 2000 to 2003 file format backend? I understand that the new field properties wouldn't be available in the mdb backend, but besides that, would they still link properly?Thanks
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Apr 12, 2005
Hello all
I have a "Read only" frontend and Backend as 2 different files on the LAN shared drive.
i have around 50 users logging on to this to view information (No editing allowed by the user).
I read on some of the previous forums that Multiuser frontend does not work that well. I want to know if this is true even if my users are in read only mode??? I have tried with 3 users and it works with out a hitch. i just want to be sure before i roll out this to the entire 50users.
thanks
soni
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Jun 22, 2006
Hi people,
Does anyone knows the difference between frontend and backend database? I look 4ward to hearing from any database expert.
black85
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Jan 12, 2012
I have a backend-database on a network disk shared by 6 users. All users have a frontend client wich they use to administer the datebase. Everything in the frontend looks ok and they can query the latest data. However if I open up the backend database tables nothing has been updated since the middle of december. If i make a copy of the backend I can open it up and create new posts with ID-numbers that has already been taken by the frontend.
Ofcourse I have doublechecked that the clients are connected to the right backend file (there's only on backend file in the directory).
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Nov 22, 2007
Hello everyone,
I was looking for a great way to link and relink BackEnd to FrontEnd and I sort of found it.
Bob larson build a great extensive tool to autoupdate backend en master frontend. You can find his great post here: http://www.access-programmers.co.uk/forums/showthread.php?t=111132&highlight=back+end
Here is my problem or wish is more appropriate.
I just want to relink the backend and if the backend isnt found I want to select it using the filedialog.
Who can help me...
Perhaps you can Bob???
I included the file
I realy hope that you can help me guys.
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Mar 31, 2015
If I want to distribute a front end to connect with a MySQL back end ... do I need to set up the system DSN on each workstation that will be using the front end?
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Jul 17, 2012
If I have an MS Access frontend that connects to an MS Access backend, is there a way to hide/permission block the pathway to the backend's folder but still allow access via the frontend db?
Right now I can't dedicate a server to a more "secure" form of DB or anything like that so I'm stuck with MS Access for now. I just don't want someone looking at, say, a link table path and then navigating to that folder and getting access to backend information.
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Jan 2, 2015
I am attempting to build a table relationship, however when I enforce referential integrity, I keep receiving the message: "No unique index found for the referenced field of the primary table".
I checked and I have no duplicates in the primary table or secondary table.I will set up the two tables as thus: 1. Master table - People Who Eat 2. Secondary table - a table for all people who eat pizza.
I am trying to link my pizza table to the Poeple Who Eat table. I have created my own primary key for each table (an account number). My secondary table is much smaller in population than the People Who Eat table (which would include data from other subgroups). I am trying to get the 'yes'/'no'/'uncertain' from the secondary table into the primary table without manual entry.
I have searched all over the web and have not been able to find why the tables will not link. I am new to Access, so there may be something I am overlooking. Is there a way to get this information from the other table other than building a relationship?
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Aug 30, 2013
I have tbl_orders which records orders. I have a linked table called tbl_order_lines which details the items against each order.
In a nutshell, an item can only appear once in an order. However, I do not know how to create a relationship or code the frm_order in order to reflect this in my DB.
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Feb 10, 2014
I am using Access 2007, and I mistakenly created a duplicate table in Relationships. And, I have not been able to removed it or delete it.
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Sep 13, 2012
I have 3 tables
tblProductInfo
- ProductID
- ProductItemNumber
- JDEDescription
tblFacility
- FacilityID
- FacilityDescription
tblProductFacilityMM
- ProductToFacilityID
- ProductIDFK (combined with FacilityIDFK to make a PK)
- FacilityIDFK
As I'm writing this out, I am realizing that tlbProductFacilityMM.producttoFacilityID is probably not necessary, but that I don't expect that to have much significance to the issue. So I've setup a query between the two tables:
Code:
SELECT tblProductInfo.ProductID, tblProductInfo.ItemNumber, tblProductInfo.JDEDescription, tblProductFacilityMM.FacilityIDFK, tblFacility.FacilityDescription
FROM tblFacility INNER JOIN (tblProductInfo INNER JOIN tblProductFacilityMM ON tblProductInfo.ProductID = tblProductFacilityMM.ProductIDFK) ON tblFacility.FacilityID = tblProductFacilityMM.FacilityIDFK;
And used it to create my subform which is simply a drop down box for tblProductFacilityMM.FacilityIDFK. My main form is one that has already been in use for 6 months or so, it is based off the tblproductinfo table and needs to have the option to select multiple Facilities for each ProductID. I inserted the subform, but when I try to select a facility I get an error that reads:
Quote: Cannot Join Records; Join key of tblProductFacilityMM not in recordset.
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Sep 14, 2014
I'm trying to create a database at work keep track of projects I'm working on and all the different events that happen during the project.
I want the main table to be customers, which will include the job number (as the primary key) name, address etc. Then I need other tables that have information about the building permit that will include dates city names etc and then another table that would include information on our sales people and so on, there would be maybe 5 tables that all connect back to the customer table.
I have tried this several times and keep running into problems, I'm sure it has something to do with the relationships. I'm missing something. I can create 2 tables and it works fine but once I add a 3rd it wont work.
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Sep 17, 2014
My db is split into front-end and back-end. In the f-e's Relationships schematic, I can see the relationships as they were defined at the time when the db was split, complete with the one-to-many symbology.
I can add a new table to the b-e and set its relationship as one-to-many, enforcing referential integrity and cascading as I wish - and the schematic (in the b-e) reflects that.
In the f-e, I can then use the <Get External Data - Access Database> function to link to the new table, and I can add the new table to the relationships diagram in the f-e. I can also drag and drop to link primary and foreign keys (within the f-e), but cannot select one-to-many. I'm OK with that, as I understand that the relationship is within the b-e, and this is just a diagrammatic representation.
But I can see the one-to-many relationships between the tables which existed when the db was split, and I would like to be able to see the new table's relationships in a consistent fashion. Updating the linked tables via the Linked Table Manager does not do the trick.
Surely I don't have to split the database again in order to achieve a consistent diagram - do I ?
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Mar 24, 2014
I'd like to secure my frontend by disabling access to the linked tables, queries etc. I thought converting to .accde would do this but apparently not. Is there a way that this can be achieved?
I am aware that I can disbale the ribbons etc but they can all be turned back on using the options menu.
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Nov 30, 2006
Is it possible in access to link to both oracle AND access tables in the same
access application?
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Mar 12, 2013
I'd like to to import some large oracle tables from a remote server using "DoCmd.TransferDatabase..." on a daily basis. Currently, the system works, but my database is getting quite large (800 Mb) and I'd like to split off the tables to a back end database.
Is there a way to import directly to the back end database? The postings that I've seen seem to imply that one must first import the tables into my front end, then export them into the back end. Does that sound correct?
I'm at home right now, but will give it a try when I get to work. It just seems like there's got to be a more direct way!
Jon Mulder
Department of Water Resources
Red Bluff, CA
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