Multiple Back-ends
Oct 16, 2006
For the company I am doing my thesis, I developed a tool in MS Access for monitoring sales data, customers, employee data etc…
The tool is working with a front-end database, installed locally on every PC and a Back-end on the company’s server ( Located at city Genk)
The tool is working smooth on the location in Genk.
But then the problem occurs when this tool had to be used on an other company location, 100km from the server (Antwerp); the waiting and loading times are very long, even for the smallest data.
Obvious this is because the companies network from one location to another is too slow. But because of financial reasons I’m looking for a software solution.
An idea is to create a Back-end server for each location, for all local data and one general back-end server for unique data ( for instance: there has to be a unique calculation number for each calculation made in the entire company).
I think this will decrease waiting times for some data, but not all…
Or does anyone have an other idea?
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Oct 16, 2006
For the company I am doing my thesis, I developed a tool in MS Access for monitoring sales data, customers, employee data etc…
The tool is working with a front-end database, installed locally on every PC and a Back-end on the company’s server ( Located at city Genk)
The tool is working smooth on the location in Genk.
But then the problem occurs when this tool had to be used on an other company location, 100km from the server (Antwerp); the waiting and loading times are very long, even for the smallest data.
Obvious this is because the companies network from one location to another is too slow. But because of financial reasons I’m looking for a software solution.
An idea is to create a Back-end server for each location, for all local data and one general back-end server for unique data ( for instance: there has to be a unique calculation number for each calculation made in the entire company).
I think this will decrease waiting times for some data, but not all…
Or does anyone have an other idea?
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Sep 30, 2014
My question encompasses a front end connected to multiple back ends. It is probably a mundane point, but reading a few articles didn't seem to touch on it.
By this, let me toss out that I am thinking of the personnel where I work when I say 95% have a hard time using email and MS Word, let alone mundane functions like find a file, etc. As such, I have to make my front-ends extremely user friendly.
With that in mind, when developers have multiple back ends, what are thoughts about the best way to relink when required? Even when there are 'more sophisticated' users? Security not an issue or is an issue (inasmuch as can be handled in access)?
Ex: Large corporation with a multitude of user ability. Large database with say 3 different back ends.
I was thinking about keeping a front-end table with each table name and UNC path, hard coding paths to corresponding table names, etc.
Personally I don't have a need for multiple back-ends, but the question came up while reading.
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Jul 25, 2007
Hi guys,
I need help with security settings and that. I have a database which i want available on a shared server. Basically i only want people to beable to see one form but not beable to see anything else or make any changes to this form.
Do i need to split and make a front and back end? I will want to make occasional changes to tables etc.. and so would want this to automatically update on the database seen by everyone else.
Sorry, not making much sense but am bit confused about it all!
Any help from some clever peeps?
Ta
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Mar 8, 2013
i have one front end access database and want to connect with more than one back end at time but both back ends have same table names
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Aug 21, 2006
Hi
I am tryin now (having cured my first troubles lol) to update multiple fields at once in my db from an asp web page. Code involved is
Code:DIM idid = request.querystring("id") strDSNPath = "PROVIDER=MSDASQL;DRIVER={Microsoft Access Driver (*.mdb)};pwd=password; DBQ=" & Server.MapPath("....dbusers.mdb") strSQL_insert = "UPDATE * FROM CustRecords SET " & _"Cust_Name ='" & strName & "', " & _"Cust_LastName ='" & strLastName & "', " & _"Cust_Status ='" & strStatus & "', " & _"Cust_Orient ='" & strOrient & "', " & _"Cust_Address ='" & strAddress & "', " & _"Cust_City ='" & strCity & "', " & _"Cust_Country ='" & strCountry & "', " & _"Cust_PostCode ='" & strPostCode & "', " & _"email ='" & strEmail & "', " & _"Cust_PartName ='" & strPartName & "', " & _"Cust_PartOrient ='" & strPartOrient & "', " & _"Cust_Descrip ='" & strCustDescrip & "', " & _"Cust_Goal ='" & strGoal & "', " & _"Cust_Username ='" & strUsername & "', " & _"Cust_Password ='" & strPassword & "', " & _"Cust_Question ='" & strQuestion & "', " & _"Cust_Answer ='" & strAnswer & "', " & _"Cust_Type ='" & strLastName & "', " & _"Cust_IP ='" & strUserIP & "', " & _" WHERE id="&id Set Conn=Server.CreateObject("ADODB.Connection") Set rs = Server.CreateObject("ADODB.Recordset") Conn.Open strDSNPathConn.Execute strSQL_insert Conn.Close Set Conn = Nothing
Long winded I know but usually works and I am getting the following error
Code:Microsoft OLE DB Provider for ODBC Drivers error '80040e14' [Microsoft][ODBC Microsoft Access Driver] Syntax error in UPDATE statement. /sitesec/first_time1.asp, line 179
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Apr 10, 2014
I have the attached code in a query. It should be bringing back just one row for each record, however, if I have anything in any column other than Call_NUmber_int it brings back multiples if that record.
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Jun 19, 2014
Code:
'Pacer frame set to proper background
If Me.FrmPacer.Value = 1 Then
Me.LblPacer.BackColor = vbGreen
ElseIf Me.FrmPacer.Value = 2 Then
Me.LblPacer.BackColor = vbYellow
ElseIf Me.FrmPacer.Value = 3 Then
Me.LblPacer.BackColor = vbRed
[code]...
I have multiple frames on one subform that when selected sets a unassociated labels back color. Then when cancelled by undo code the back color stays on the color that it was changed to on afterupdate event from the frame with option controls. I would like to loop thru but could not come up with the proper method if it is even possible.the above code works after refreshed, but just wondering if there is a shorter or more efficient method.
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Nov 5, 2005
WHAT IS WRONG WITH THIS CODE:
Dim wsp As Workspace
Dim fInTrans As Boolean
On Error GoTo C4Err
fInTrans = False
Set wsp = DBEngine.Workspaces(0)
wsp.BeginTrans
fInTrans = True
DoCmd.OpenQuery "query1"
DoCmd.OpenQuery "query2"
DoCmd.OpenQuery "query3"
DoCmd.OpenQuery "query4"
wsp.CommitTrans
C4Exit:
Set wsp = Nothing
Exit Sub
C4Err:
MsgBox Err.Description
If fInTrans Then
wsp.Rollback
End If
Resume C4Exit
I WANT TO RUN 4 BIG APPEND QUERYS BUT IF USER PRESS ESCAPE BUTTON BEFORE ALL QUERYS ARE FINISHED - THEN ALL RECORD CHANGES MADE BY THOSE QUERYS MUST BE CANCELED.
SO I MADE THIS CODE. BUT IT DOES NOT WORK.
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Feb 4, 2007
Hey guys!
just wondering if there is an way to command
Call Shell("my_bakcup_string",1)
and wait 'till the bakcup program ends to go next command in VBA
thank you! :cool:
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Jun 24, 2015
I have a small system that consists of a back end data base and 2 front ends. having 2 front ends was a historic reason but they cover 2 distinct processes in the system.
I now have the need for using the same module(s) in both front ends. Each has a copy which is fine if nothing changes but when it does I have to apply the changes made (or copy over in its entirety) from one front end to the other.
Although this is no big deal I can forsee it slipping through the net.
Can 2 front ends access the SAME module and if so how?
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May 7, 2013
I have (on a company network) a FrontEnd .accde and a backend .accdb - currently ~ 10 users (some over wifi - slow!)The FrontEnd is becoming a rather large file ~ 10 MB and is also becoming slower.I am looking to separate this in to 3 FrontEnd files as to simplify and to lessen the file sizes etc.
My question is - are there any issues around a 3 x FrontEnd databases all connecting to 1 x backend database holding all the tables - over a network?
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Mar 19, 2015
I have a very unusual situation where I need the name of a field in an Access table to end with a blank (i.e. space). I tried doing it trivially while in Design View but no dice. I tried it through some SQL along the lines of the following pseudo code
Select [old table].[Address] as [Address2 ], [old table].*
Into [new table]
From [old table]
but the new field's name "Address2 " lost the final space.A third try was through some syntax for an Alter Table statement to add or modify a field. It didn't pan out.
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Nov 3, 2007
Hi -
Just a reminder that US Daylight Savings Time ends 4 Nov 2007 (First Sunday in November) at 0200, at which point the time (minus Indiana) reverts to 0100.
If getting your PC to cooperate is a problem, you might check the following for guidance:
http://www.uic.edu/depts/accc/systems/daylight/windows.html
Best Wishes - Bob
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Sep 10, 2013
I have recently asked about being able to use my table system online. i have just thought. what about creating a front end that works online. still have the front end on the desktop and the table system on the desktop but have both of them connecting to the one table system.
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Sep 11, 2012
I have the following in Column A
url.com?valueA
url.com?valueA&valueB
url.com?valueC
I need a function that
If string "ends with" valueA or ValueC, then replace it with ValueD
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May 14, 2013
I have a form containing a subform. The subform is opened in data entry mode, so it displays no existing records. However if the user right-clicks the form and selects a sort, all records are displayed. Is there any way to stop this behavior so that the form remains in data entry mode?
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Aug 27, 2013
I have a combo box that contains a list of values, but users can add their own if they choose. If the value they type in isn't on the list, the Not In List event fires. Once the procedure is done, the form inexplicably closes.
Oddly enough, it only closes under certain circumstances - the code provides several different options for saving the new data, and if I choose different options, the form works as its designed.
Further, if I insert a breakpoint anywhere in the code, then hit F5 to let the code run, the form works fine. Literally, the breakpoint can be anywhere in the procedure from the first line (On Err...) to the last line in the Exit block, "Exit Sub".
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Apr 12, 2013
How do I hide or disable the File tab in Access 2010 on my front ends?
The file tab being present allows end user to get into Privacy Options and Printing. Printing is okay if I could disable the Privacy Options for end users, then it wouldn't matter if they have access to the File Tab.
Possible very serious security issue!
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Aug 9, 2013
I have a split data base and want the front ends to close after a period of time.
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Apr 25, 2005
Hi,
I have a database which is secured via a workgroup.
I have just ran the database splitter to seperate the data into a back end. But now I can open the back-end directly without any password.
How do I ensure that the back end is still secured when doing this?
Thanks,
Adam.
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Jul 28, 2005
Hi folks,
I've built a few simple databases in the past, but never one where security was required. Now someone wants a database where access to certain areas is limited. Everything I read about Access Security here makes it seem complicated, and flaky, so I was wondering about doing something simpler ;
1. Make the Back End password protected so no one can open it
2. Make the front end an MDE. Put certain forms behind a form which prompts for a password. Store the password in a table to allow it to be changed if required.
So this looks like a crude method to me, but it is for a small user base, where the manager needs access to certain info which employees shouldn't see. I suppose if an employee was so minded, and put in some effort, they could get around the simple password-protection, but is it worth setting up proper security for a small project ?
Can anyone offer any advice on how much more secure the database would be if I did it properly ?
Thanks,
StepOne
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Oct 12, 2005
Hi,
I come with a mainframe background so please excuse me for my Ignorance on Ms-Access/VBA. :(
I am in the process of developing a solution using Access/VBA. I want to include custom Database Backup and Restore facility within my Application. :rolleyes:
For example:
Say I take a backup of the Database before the monthly update and store the backup (in a folder).
After the update, if a user thinks that the monthly update did not go as he was expecting (this could be because of the data that he fed into the application) - I want to give a option asking user if s/he want to rollback to a previous version of the database. (This will be similar to Windows SYSTEM RESTORE facility).
The Database sits on a network drive (mostly this would be used by one user for the update part and may be 1-2 users who would be viewing the reporpts that come out of it)...So I can safely say it is a stand-alone, single user system.
What I would to ask your help is on following.
1. While my application is running how do I do the restore?
Or do I have to have a seperate application which performs this (ie., restore/backup) operation?
2. While my application is running, Can I take a backup copy of the Entire Database?
Any other hints/help regarding this would be much appreciated. :)
TIA,
PW.
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Jun 12, 2007
For some unknown reason I am unable to open the back end of my database, as far as I can see it has not effected people adding data through the front end, I just can't open the back end.
I checked the file format and it has changed to a LDB file, no idea what this is or why it has changed, any ideas on what has happened and how I can fix it?
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Oct 19, 2007
Hi friends,
I think I am having some problem with my back end and frond end files. I have a mde file that anytime I enter new data or change some things in the old clients file, it does not update on the mdb file. Anytime I need to change forms or report or any thing at all, I am suppose to copy the BE file and the MDB file to my workstatio, remove the table link, make the changes I want to make on the design mode and then import the files back to the live copy of the mdb file then make another mde file to work with. But When I copy the BE and the MDB files, I don't have the updated client list or new client just added. So as not to affect other users, I can not make changes in the MDE file and even the MDE file will not even let me make any changes in design mode. I don't know If I am making sense but any help will be appreciated
thanks
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Oct 24, 2007
Cannot open back end database.
There are no other users logged on
Tried opening it in open exclusive mode but still error message.
Front end on number of desktop PC's.
Back End on server.
I need to get in design mode on back end but won't let me.
I get logon screen but when try to log on get message below
I can log onto front end ok.
Error message something like.
* You do not have perimission to open or enable database
* You must have open/run open/exclussive administer permissions.
* Request other users to log off
e.t.c.
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