How To Detect When Data In A Linked Table Is Idepenently Updated
Mar 17, 2008
I have developed an application using MS Access and MySql tables.
The Access forms maintain/display orders that are stored in the MySQL linked tables. The MySql tables can also be updated independently by another process. The problem is that the Access forms do not reflect the backend changes when they are made by the other process.
For the moment I have implemented an on Timer process that causes a requerys for the forms every 5 seconds but this is not very elegant and causes the form screens to flicker.
Is there a better way I can automatically make the front end forms reflect changes to the back-end database when it is updated indepenently ?
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Jul 27, 2005
I have a very simple database used by 3 users at a time. It is split into BE and FE. One user accesses the DB with queries only so I have created a DB with the master file linked - and literaly nothing else, She will then create and save all of her queries here. But - I want to keep her from accidently updating the file from here. I can't seem to find a simple solution to simply not allowing her to update. Any ideas? Thanks - Dika
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Nov 23, 2013
I have created several queries that in turn create a report. I am trying to write some VBA script to make them execute correctly, however am having trouble with the loop function.
DoCmd.OpenQuery "Qry_SubjectColleaguesByDivision"
Do Until Tbl_ReportSubject.RowCount = 0
DoCmd.OpenQuery "Qry_DataToTrainingReport"
DoCmd.OpenQuery "Qry_DeleteDataToTrainingReport"
Loop
DoCmd.OpenReport "Rpt_TrainingDue28Outstanding"
DoCmd.OpenQuery "Qry_ClearTrainingReport"
Qry_SubjectColleaguesByDivision populates Tbl_ReportSubject with the relevant colleagues. Qry_DataToTrainingReport calculates the report data for the first user in the list and copies to Tbl_TrainingReport, Qry_DeleteDataToTrainingReport deletes their record in Tbl_ReportSubject. Qry_ClearTrainingReport clears Tbl_TrainingReport.
My issue is getting the DO UNTIL statement to work. I am trying to get the loop to finish when there are no records in Tbl_ReportSubject.I know the data structure does not seem robust based on how the data is handled, however this is to do with a) Legacy issues, and b) data importing from other systems.)
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Jan 13, 2014
I have an MS Access accdb with linked SQL Server 2012 ODBC tables. I am working on a procedure to copy data from local tables to these linked tables (identical schema). I did a simple
Code:
DoCmd.RunSQL "INSERT INTO linkedTable SELECT * FROM localTable"
This works, but is very slow. Way too slow. (INSERT copies the data one record at a time).
I would like to copy the data in a bulk operation, or operations that I can execute programmatically.
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Aug 29, 2006
Hi,
I am extracting data from linked db2 table using access make table query. First I create a select query and can view the linked db2 data, but when I change to a make table query I get an error message, "invalid argument", when I run the make table query. There is no selection critera specified. Has anyone had this happen? and Do you know a solution?
Thanks for your support
GinnyP
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Aug 17, 2012
I have one DB that is used for creating/storing customer ID's, and another DB that is used for creating/storing job information for customers.I have linked the table from the customer DB to the job DB.
There is a table in the job database that holds customer name and ID, and some VBA that generates unique job codes.
Is it possible to have the data from the linked table automatically update into the existing table?
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Nov 21, 2013
I'm having trouble with a new project I'm working on. The application is mainly going to be used to display data, which comes from a linked table. It has to be a linked table (in my opinion) because it's replaced once per week from a fresh data dump. For each of those records, though, there will be notes made in a local table named "Custom-Data". My trouble is displaying a mix of information from the linked table, "Roster", and "Custom-Data" because linked tables can't be assigned a primary key.
Essentially, when a record is pulled up, a bunch of data from "Roster" will be shown in addition to the comments from "Custom-Data".
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Apr 22, 2014
I'm wondering if it's possible to create a Query / Macro / VBA or whatever works, to detect the duplicate records in a table and delete them with the push of a command button. Or, even to do this automatically when the database opens using an AutoExec macro or something ?. I'd like for one copy of each record to be left intact in the table.
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Nov 11, 2013
I have two table
1 is name master containing EMPID(Primary Key)
2 is Saving which also contain EMPID
i want to entered data in Saving with each and every EMPID with Master
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Nov 29, 2005
In a linked table Access solution where the tables reside on the network, and each user has a front-end on their desktop, does all the data travel over the network to the clients desktop to do the query, or since the backend is Access and it can obviously understand the query, does the backend do the query and just return the resultset?
Thanks
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May 1, 2015
My goal is to get a huge amount of data paired down so that I can work with it in Excel.
I started with a 14 million record text file provided by a government agency. I used a text editor to break that into 7 2-million record files to fit into Access.
I figure I can filter each of those files down to 500,000 or so records, so that I can manipulate them in Excel. The problem is, when I open a text file in Access, Access insists on linking it, and then I can't delete data from a linked file.
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Jun 27, 2012
I have all my data sitting on a server in SQL. Within Access, I have linked tables pointing at SQL tables. I display the data on an Access form. Somewhere in their it is dropped a few records. This system is used for in and out processing and occasionally misses a few individuals. Could this have anything to do with the method in opening the table, ie dbopenTable vs dbOpenSnapshot.
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Dec 31, 2012
I have a database with a form called "Main" where users input data and then print a report from it. "Main" has fields in it from another form "Members". This data (from "Members") is shown on "Main' by Dlookup coding, and therefore cannot be selected for input by the user. Now, lets say a user inputs data into "Main" and prints the report on 12/30/2012. On the next day, a member's name is changed and I update that data in the "Members" form. On 12/31, I would like to print the report again, but it shows the updated member's name instead of what is was like on 12/30. How can I keep the old data in case I want to print the report in the future like it was initially printed? What do I need to do to any form(s), report or what VBA code needs to be written?
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Aug 31, 2007
I am trying to build a Form that will show an estimate (then eventually will be moved to a project if customer and employee aggree to price and project) in a Form F_Estimates is a M_Customers(Customer_ID) (Based on a Table) and thier info in a Subform. Also is the "projected costs" from parts out of the Parts(Part_ID) (Based on another Table) in a second Subform as a list that I need to calculate $$$ in
(Dang that still sounds evil and definately NOT understandable even after edit... so)
Here's some basic info
Tables
EstimatesandParts - Table
EstimatesandParts_ID : Autonumber
Estimate_ID : Number
Part_ID : Number
Parts - Table
Part_ID : Autonumber
PartNumber : Text (not a number due to some part#s have letters in them)
PartName : Text
Unit Price : Currency
Description : Text
Estimates - Table
Estimate_ID : Autonumber
InvoiceNumber : Text (again can have letters in it)
EstimateDate : Date/Time
EstimateTime : Date/Time
Employee_ID : Number
Customer_ID : Number
ProblemDescription : Memo
Customers - Table
Customer_ID : Autonumber
FirstName : Text
LastName : Text
CompanyName : Text
Address : Text
City : Text
Province_State : Text
Postal_ZIPCode : Text (CDN Postal codes are letter num letter...)
you can see the link table in the EstimatesandParts Table
Now I want to use that link to populate a subform in the F_Estimates form
Forms
SF_Customers - SubForm
(all boxes atm are text boxes on this form till I figure out the Parts section then will use same base for this so I can pick any customer in the database to be the customer for this estimate. Also will have ctrl button for making new customer with customer form and a refresh on Focus Gain bit of code)
FirstName
LastName
CompanyName
Address
City
Province_State
Postal_ZIPCode
SF_Parts - SubForm
Default View -Continuous Forms
(want it to be a list of parts that I can grab prices and descriptions from then in a bit of code to calculate a cost of parts)
Part_ID : Combo Box
Control Source - Part_ID
Row Source Type - Table/Query
Row Source - SELECT Parts.Part_ID, Parts.PartNumber, Parts.PartName, Parts.UnitPrice, Parts.Description FROM Parts ORDER BY Parts.Description;
(Pulls info from the table Parts for input into a list of parts to be used on that project)
PartName : Text Box
UnitPrice : Text Box
(here's where I run into problems due to the fact that the form is not based on the parts table but rather the link table EstimatesandParts so I can't propogate the info to the 2 other text boxes, ps I dont care if they cant be text boxes and have to be linked or some other type I'm not "set" just need to find out how to make it work )
(have tried a couple things to complete this task)
Me.txtPartName = Me.Part_ID.Column(2)
Me.txtUnitPrice = Me.Part_ID.Column(3)
(works AWSOME ... for ONE ROW then propogates the second selection to the first and second and third selection to first second and third and so on ...)
(tried to make control source for the txtPartName to)
=Forms!Parts!Partname
(Doesnt exist .. akkk, cant use ActiveForm either as it doesn't focus on the SubForm but the MainForm ... cry)
F_Estimates - Form
Estimate_ID
InvioceNumber
EstimateDate
EstimateTime
ProblemDescription
(all basic Text Boxes)
Employee_ID
Customer_ID
(Combo Boxes Select Customer and Employee from list of present ones of each)
SF_Customers
SF_Parts
(Both SubForms on the main form)
Now this is an Exerp from my entire Database I like to work on one small problem at a time and I have made this its own little database till I figure out the problem then I will bring the info I learn back into the rest of the database and go from there ...
Hope you can help I have a feeling I will need to make a recordset and go from there but I'm just not able to wrap my head around that for some reason
Thanks in advance for ANY and ALL help that I get from here
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Nov 14, 2007
Hi everyone,
I was wondering if this is possible to do:
I have a Form that reads from one Linked Table and Updates a Local Table. Is it possible to move the Local Table to the Back End and still be able to append fields and change field names etc?
If anyone can help, that would be greatly appreciated. Thank you in advance.
Bear
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Dec 3, 2005
I have linked a SQL table to my ms access database. In order to view the SQL table as read-only and still be able to update the access table I have setup a form with a subform.
I know it would be a dublication of data but is there a way thru code of copying the data on the subform to my access table. I was hoping I could put a button on the form that would copy this data. My idea is after the copy is done all the information I need will be in my access table. I'm new to this linking idea and am worried I will only have half the information I need if the link breaks etc.
Thanks
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Feb 6, 2014
I have a table in MS Access 2010 that is a link to an external data file in .csv format. I assumed that it was not possible to append data to a linked table until recently. I appended 3 records to the linked table and discovered that the 3 records were appended to the table and the external data file it was linked to.
What am I missing ?
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Apr 9, 2014
I have a table that have about 5000 records. Also I have a report that include a label which is linked to this table.
The problem i have is that when i have heavy data in the table like 5000 record and above, the label is not taking data from first to last record from the table, it is taking from record 1200 reaching record 5000 then it takes record 1 to 1199.
Therefore when label is previewed, we are viewing data on label from 1200 to 5000 then from 1 to 11900 and not from 1 to 5000
On the other hand, when i don't have heavy data in the table, everything is working good and the label is getting its data from first to last record successfully.
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Jun 8, 2007
Hi All,
Although familiar with CR, SQL and other such things. I have never had cause to use Access all that much.... Until Now!
My problem is easiest explained by my requirements....
I have a db table called Source. The data for this Table is populated by a form called Technical. Technical containes a series of fields (SO No, SO Line No, WO No etc etc). Some of these fields are lookup fields linked directly to the SO_Header Table in our main ERP software via and ODBC connection. The result is the SO No field is populated with a list of Sales Order No's as they exist within the ERP software. Within the Technical Form I have also the Customer Name.
This is where the problems begin. Within the ERP software we have two tables which I need to use: SO_Header and Customer. The SO_Header contains all the Sales Order info and the Customer table contains all the customer info. What I need to do is populate the customer name field in by db with the relevant customer based on the SO No chossen. However the Customer Name does not exist in the SO_Header table. Instead both the SO_Header table and the Customer tables contain a field called Cust_Code.
Now if I wanted to link these in Crystal Reports I would link from the SO_Header table to the Customer table using the Cust_code field. This would give me the corresponding Customer name based on the Sales Order No.
How can I get the correct Customer Name to appear automatically in my Access form based on a SO No chossen by the user?
I would realy appreciate any help on this! If you need me to clarify anything please ask.
Thanks in advance!
RobV
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Jul 2, 2014
I have a table that is linked to a survey and pulls data from the limesurvey backend.
The user would like to add a local field, so they can add entries to each row of data.
Is that possible ?
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Nov 29, 2004
Hey guys im stuck on this one.
I need a fax # to be changed from 1 format to another.
i dont even know where to start any help would be appreciated.
the original data is already in a table like so; (999)#000-0000
and i need on my final table or query all the records to be:9990000000
I have been stuck on this one all weekend long, can it be done.
thank you.
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Aug 29, 2005
I'm using MS access and Excel 2000. I have an Excel spreadsheet that contained 8 columns, the first column has all cell format as Number, the rest of the column is set as custom date format of 'dd/mm/yyyy'. When I create a linked table in MS Access, the data types does not matched my excel spreadsheet columns, the 'Number' data type is a double and I want a Long Integer in Access, and the custom date format become text datatype but I wanted a DateTime datatype. Is there any work around this? Seems like it is a common problem.
Your prompt response is greatly appreciated!
Thanks in advance!
Martina
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Mar 8, 2014
i need to Concatenate a fields data into one cell in a query according to linked table ID....
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Jun 27, 2005
Hi, I have a form which is made up for 3 tables and I am trying to create an append query for each one in order to keep records of data before it is updated. The append queries seem to work but they append all data rather than just one selected record. I know I will next need to create a macro which can be used each time a record has been updated and a copy is sent to the archive. Can anyone help me with this, or have any useful suggestions?
Thanks.
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Jan 31, 2006
Hi,
I am using this code below to retrieve the last updated time on the tablea.
lbl_DataLastUpdated.Caption = "Data last updated: - " & Format(CurrentDb.TableDefs("ATM_Info").LastUpdated, "dd/mm/yyyy hh:mm")
This works but the problem i have is, when i add an entry via a form or do anything else via a form. This does not get updated?. I check the properties of the table and that isn't either.
When i then modify something manually in the table (go in and change it). It then updates.
Is there something im doing wrong or is there a better way to check the last updated.
Thanks
k0r54
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Jul 5, 2006
This one is driving me NUTS! I have a form with a combobox, a few textboxes, and a sub-form.
On Load the form is populated with a sql command/rcSet.Fields() results.
The user then chooses a status from the combobox to narrow down the results. The combobox OnChange event looks like this...
sDate = Forms("frm-MENU").txtS_Date.Value
eDate = Forms("frm-MENU").txtE_Date.Value
xJob = Forms("frm-HD/DVR_CC").lstJob.Value
On Error GoTo hd_dvrErr
'this gets the top of the HD/DVR form
sSQL = "SELECT Count(*) AS Total, Sum(IIf([pmt_meth] In ('C','E'),0,1)) AS Error, Sum(IIf([pmt_meth]='C',1,0)) AS [Credit Card], Sum(IIf([pmt_meth]='E',1,0)) AS EFT " & _
"FROM [tbl_HD/DVR_CreditCard(*)] " & _
"WHERE ((([tbl_HD/DVR_CreditCard(*)].CDATE) Between #" & sDate & "# And #" & eDate & "#) AND (([tbl_HD/DVR_CreditCard(*)].JOB_TYPE) Like '" & xJob & "*'));"
Set db = CurrentDb()
Set rcSet = db.OpenRecordset(sSQL)
With Forms("frm-HD/DVR_CC")
.txtTotal.Value = rcSet.Fields(0)
.txtError.Value = rcSet.Fields(1)
.txtCC.Value = rcSet.Fields(2)
.txtEFT.Value = rcSet.Fields(3)
End With
'this gets the bottom or subform of the HD/DVR form
sSQL = "SELECT IIf([Agent]='UNKNOWN','xxxxx',[REP]) AS [Agent ID], [tbl_HD/DVR_CreditCard(*)].Agent, [tbl_HD/DVR_CreditCard(*)].JOB_TYPE, Count(*) AS Total, Sum(IIf([pmt_meth] In ('C','E'),0,1)) AS Error, Sum(IIf([pmt_meth]='C',1,0)) AS [Credit Card], Sum(IIf([pmt_meth]='E',1,0)) AS EFT, Sum(IIf([pmt_meth] In ('C','E'),0,1))/Count(*) AS [Error Rate] " & _
"FROM [tbl_HD/DVR_CreditCard(*)] " & _
"WHERE ((([tbl_HD/DVR_CreditCard(*)].CDATE) Between #" & sDate & "# And #" & eDate & "#)) " & _
"GROUP BY IIf([Agent]='UNKNOWN','xxxxx',[REP]), [tbl_HD/DVR_CreditCard(*)].Agent, [tbl_HD/DVR_CreditCard(*)].JOB_TYPE " & _
"HAVING ((([tbl_HD/DVR_CreditCard(*)].JOB_TYPE) Like '" & xJob & "*')); "
Set qdTemp = db.QueryDefs("qry_HD/DVR")
qdTemp.SQL = sSQL
qdTemp.Close
If Not Forms("frm-HD/DVR_CC").FormFooter.Visible Then
Forms("frm-HD/DVR_CC").FormFooter.Visible = True
Else
'DoCmd.Close acForm, "frm-HD/DVR_CC(Footer)", acSaveNo
End If
DoCmd.OpenForm ("frm-HD/DVR_CC(Footer)"), acNormal, , , , acHidden
Forms("frm-HD/DVR_CC(Footer)").Recalc
Forms("frm-HD/DVR_CC").Refresh
Forms("frm-HD/DVR_CC(Footer)").Refresh
' DoCmd.MoveSize Height:=Forms("frm-HD/DVR_CC(Footer)").WindowHeight + Forms("frm-HD/DVR_CC(Footer)").FormFooter.Height
exit_hd_dvrErr:
Exit Function
hd_dvrErr:
MsgBox Err.Number & "-" & Err.Description
Forms("frm-HD/DVR_CC").FormFooter.Visible = False
Resume exit_hd_dvrErr
End Function
I have used similar code on another form and everytime the search criteria changes the sub form updates to reflect such. I know I am missing something small; can somebody please point it out?:D
I need to have the subform show the updated (choice from combo) criteria.
If this seems to cloudy, please let me know and I will try and revise
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