Relationships And Table Data Cascading
Nov 22, 2006
Hi All
I've worked with Access in the past but haven't touched it for 6 years now so I've forgot a lot of the things i've learnt. Bare with me while I try and explain it as clearly as possible
I'm creating a Database for work which will register all our Commerical Clients, which projects the clients are related to and which students worked on them projects. So I have 3 main Tables:
1.Commercial Clients
Client ID
Company Name
Contact
Title
2. Commercial Projects
Project ID
Nature of Project (Graphic Design, Multimedia, Media)
Project Name
Project Information
Staff Member Responsible
Start Date
End Date
3. Students/Graduates
Student ID
Student Name
Area of Expertise
Contact Details
Last Project worked on
Right here we go.....
Each commercial Client can have more then one project to their name. Each Project can have more than one student working on it and each student can be working on more then one project.
My relationships are set up like this:
Commercial Clients <One to Many> Projects
Projects <Many to Many>Students
What I have done is create forms with sub forms in to enter to extra data. I dont know if this is the right way to do it but it seems to easiest way. Please show me a way that will work better if you know it.
Anyway... the way the tables are now I can on cascade the information down through the tables.... it will not cascade upwards. I have ticked everything you can possibly tick for all relationships. So when I can enter projects in the Subform on the Commerical Clients Form and I can enter students on the subform in the Projects form. But on the Student form the projects the students at on does not show up in that subform and entering the day only tries duplicating it (which i dont want to do). If I had a form that showed the projects and the related commercial clients in the subform it wont find the commerical clients. So i.e.
It shows fields when the cascaded down like:
Commercial Clients
V
V
Projects
V
V
Students/Graduates
But it wont show if its:
Commercial Clients
^
^
Projects
^
^
Students/Graduates
Anyone have any ideas how I get get them to cascade upwards?
Thanks
Pete
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Apr 27, 2013
I'm currently using Access 2010 and I'm working on a database project. My question is related to table relationships. Within that project I do have a table that is related to other three tables where that table is the parent. The problem here is that once that table is updated or have a new value it never cascades it down to the other tables.
1- How to have multi relationship to the same field on the same table from different tables?
2- how to cascade the updates to the related fields?
3- Is there any way to force the data update to other tables?
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Jan 31, 2014
What I am trying to do is create a data entry form to an "order table" using 2 cascading combo boxes. I have created a data entry form based on a query. I can't get the cascading combo boxes to work properly.Here is the code:
Private Sub Combo0_AfterUpdate()
Combo2.RowSource = "SELECT L2_ID,L4_Element_name,L5_Category FROM qry_ord WHERE L3_ID = Combo0.Value;"
Combo2.DefaultValue = [Combo2].[ItemData](0)
Command4.SetFocus
End Sub
[code]....
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Mar 11, 2005
Hi,
I'm fairly new to database design. I'm designing a database that has 5 tables, the first table stores a persons details and a unique trace number. The other tables contain this trace number and some other details.
Is it possible that when i enter a persons details to the details table, name, Surname, Trace Number, that this trace number will cascade or replicate in the other 4 tables? How would i do this?
thanks,
Joe
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Jun 14, 2005
As part of my data structure I have a Fault table, Transaction table & Resolver table. The Resolver's are dependant on the Transaction that are selected in the fault table. What I am after (and it's not happening) is when selecting a Transaction in the Fault table the only resolver that is available to the user is the one related to the choosen Transaction.
At the moment after selecting a Transaction all Resolver's from the Resolver table are available. When creating my Fault table I selecting the Resolver field as a Lookup and choose the Transaction table and the Resolver field.
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Oct 11, 2005
Hi all, complete Access n00b here requiring some assistance if possible with the dreaded cascading combos. Would appreciate any help I can get. I've tried searching but can't find this particular problem mentioned (am probably searching for the wrong thing, but anyway...) Here is my situation:
I have a form [Component] with a simple cascading combo box scenario [cboCategory] and [cboSubcategory].
[cboCategory] has as its row source -
SELECT tblCategory.categoryid, tblCategory.Category FROM tblCategory ORDER BY tblCategory.Category;
Control source is unbound.
I have Me.cboSubcategory.Requery as an afterupdate event.
[cboSubcategory]'s row source is -
SELECT tblSubcategory.subcategoryid, tblSubcategory.subcategory FROM tblSubcategory WHERE tblSubcategory.Categoryid=Forms!Component!cboCateg ory ORDER BY tblSubcategory.Subcategory;
Control source is bound to SubcategoryID in tblComponent.
I have set up [tblCategory] as the one side of a one to many relationship with [tblSubcategory] and [tblSubcategory] as the one side of a one to many relationship with [tblComponent]. [SubcategoryID] (foreign key) is the only piece of 'category' information I am storing in [tblComponent]. I presume that's the correct thing to do since you can calculate the category from the stored subcategoryID.
The problem is that the form only seems to remember the most recent combo choice so if i fill in one record, navigate to another use the combos again, then navigate back, the original combo choice has been overwritten in the form record (although the underlying tblComponent seems to have the correct data written to it). In other words ALL records on my form display the last values that were entered using the combo boxes and not the correct values. Is this normal? I hope not, and if not then what am I doing wrong?
Thanks in advance :)
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Aug 28, 2013
Some background: I am making a form at work for a coworker with cascading combo boxes where she can select a Customer, then Platform Description, then Period, then Year. I used VBA code for these and they all seem to be working, except the Year.
Code:
Private Sub Form_Load()
On Error Resume Next
CustomerCB.SetFocus
[Code].....
I am pulling a table from Excel into Access (SD0039DA_T2), then I have used a delete and append query to populate a 2nd table (SD0039DA_T). I did this 2nd table because the first table was slowing down all of Access because it's such a large file directly linked to Excel.
The only real difference between the two tables is I added another column to SD0039DA_T called BillingYear. This is the Year in the cascading comboboxes/listboxes I am having trouble with. In the append query, I used ...
Code:
BillingYear: Right([SD0039DA_T2]![Billing Date],4)
...appended to BillingYear. I want just the year (YYYY), not the whole billing date from the original table (MM/DD/YYYY).
So I'm thinking the problem is with the YearCB section of the VBA code or something to do with my tables?
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Oct 25, 2006
Probably an easy one that I just can't think my through it. I've been trying to create some (for lack of a better term) cascading fields using the lookup wizard (to eventually be used in a datasheet view/form).
In the main table, the user needs to select a Team (A, B, C), Sub-Team (A1, A2, A3, B1, B2, etc), and a Family (A1 contains bolts, screws, and washers).
The first lookup of selecting a Team (A, B or C) was easy. However after this point I'm stuck. If the user chooses A, I only want the "A" related sub-teams to show in the next lookup. Then based on the sub-team chosen, I want the Family list restricted again.
Any ideas would be appreciated. Thanks!
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May 5, 2008
I have a form that contains two controls for determining the law that applies for specific contracts. When you select the first control, there is a drop down from which you select the country. If you select US, then the second control has a drop down with the US states available for selection. If you select Canada, then the second control lists the provinces of Canada. If you select any other country, the state box is greyed out.
At input time, this works fine, however, I am missing something to get the second control to save the data to the underlying table. I am sure it is a simple code, but I am still a novice at code and can use your help. Here is the code for the first section. I appreciate any help. The second control cboState is currently unbound and I am sure that is part of the problem but am unsure of the solution.
Private Sub cboTermsCountryLaw_AfterUpdate()
On Error Resume Next
Select Case cboTermsCountryLaw.Value
Case "United States"
CboState = Null
CboState.RowSource = "tblStates"
CboState.Enabled = True
Case "Canada"
CboState.RowSource = "tblProvince"
CboState.Enabled = True
Case Else
CboState = "N/A"
CboState.Enabled = False
End Select
End Sub
Alan
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Mar 14, 2005
Checked the FAQ on this but doesn't apply to what I need.
Basically, I have a Product Class, and Products that are in the class. My database is for a computer component business, so the clsses are Processors, Mainboard etc.. and the products that fit into that class. The Class and products are listed in the Products table, and I need a way to have it on my subform, so I can choose the product class from one combo box, and then have another combo box to view the products in that class.
Right now I have it :
SELECT DISTINCT Products.[Product Number], Products.[Product Description] FROM Products
and that lets me select ALL the items in my products list, but I also have a Product Class Combo in the form that does nothing yet - So I thought adding :
WHERE (((Products.Product Class)=(!FORMS![Orders Subform1]![Product Class])) ORDER BY Products.Product Class
To the end would sort it, but it doesn't and gives me the error : "Syntax Error (Missing Operator) in query expression"
What am I doing wrong?
Cheers,
James.
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Mar 1, 2005
This is my first attempt with cascading combo boxes (2) and with the help of the forum I've made it work BUT, I feel like an idiot because I'm drawing a complete blank on how to link them back to a "main" data table.
The example I used as a reference was to create them as unbound boxes while using queries to pull for each of the combo boxes. I have 4 tables. One will serve as the main table while 3 others are each feeding one of the combo boxes. I went back and set the main table as the record source and added some of the other fields but those unbound fields have me stumped.
If anyone recognizes an earlier post that clarifies this, please let me know. I've looked through numerous posts but haven't found one yet.
Just like everyone else, any help would be greatly appreciated.
mike
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Mar 25, 2013
updating my table when I use cascading combo boxes in my form.What is happening is that my table is being populated by the xxxxID column vice from the xxxxName column that is being used from that specific table.
here is my visual basic code that I am using to determine what the subsequent combo box will display.
Option Compare Database
Option Explicit
Private Sub cboPlanktonID_AfterUpdate()
' Set the Family combo box to be limited by the selected Plankton Type
Me.cboFamilyID.RowSource = "SELECT tblFamily.FamilyID, tblFamily.FamilyName FROM tblFamily " & _
" WHERE OrderID = " & Nz(Me.cboPlanktonID) & _
" ORDER BY FamilyName"
[code]...
Example of the Combo box Row Source is: SELECT [tblWaterbody].[WaterbodyID], [tblWaterbody].[WaterbodyName] FROM tblWaterbody;
My Control Source is PlanktonAnalysis.WaterbodyName
When I fill in the form with the data, The Waterbody name is visable for selection (example: I see "Lake Lillinonah" in the cascading combo box, But when I save the record in the PlanktonAnalysis Table I get a number in the WaterbodyName column vice the name of the waterbody
PlanktonAnalysisIDWaterbodyName172
311411511677118397104113
tblWaterbodyWaterbodyIDWaterbodyName2Ashland Pond3Bantam Lake4Crystal Lake5Gardner Lake6Hungerford Park Pond7Lake Lillinonah8Lower Bolton Lake9Middle Bolton Lake10Pocotopaug Lake11West Thompson Reservoir
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Mar 19, 2008
You know the scenario where people keep working in an old version of a database, while you work on an update... leaving you with a new database, but old data?
This concerns a database, containing about 20-25 tables all linked together.
I was asked to make an update. In this update 3 new tables were included and here and there a few of the old tables got news fields, nothing crucial and a lot of forms were changed.
The current situation:
Database 1: contains new data, misses a few tables, is missing some fields, forms and queries
Database 1.1: contains old data, but some new extra tables, added fields, forms and queries
I would like to know if it is possible to import all data from 'database 1' into 'database 1.1', so that all linked information between the data is preserved, all database relations are maintained.
If I import tables from Database 1 into database 1.1, tables just get added, not replaced. If I delete or rename tables, I loose my relationships.
I would like to know what is a common and effective way to get all the new data of an old version of a database (where people keep working in while you work on an update), into the new version of the database, that currently contains old data.
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Aug 6, 2013
I am trying to use a combo box to control which table a data entry form will write data to. I want to create a form that has a combo box to select from a top level table that I will call "Stores". Once a "Store" is selected from the drop down, the next field on the form will be a data entry field. The data entered in that field will be written to the table selected by the preceding combo box.
So, basically I would have say Wal-Mart, Macy's, Sears, K-Mart and etc, listed in my "Stores" table. Once I select one of the stores from the drop down, I would then enter a "department" name in the data entry field and based on which store I selected from the previous combo box, the data would be written to that stores department table (which each store will have its own department table), e.g., WalMartDepts, MacyDepts, SearsDepts, etc...
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Aug 4, 2014
I have a form with two cascading comboboxes where the first selection is the alphabet and the second selection is a person's name. (the alphabet is a coding system but not assigned based on a person's name) I used one table based on example 2 of this website: fontstuff. com/access/acctut10.htm
What I want to do is add columns to the table such as organization, purpose, etc. then have them in the form as textboxes that update as soon as the second combo box is selected. Is this possible with just one table or do I need to go a different route?
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Jul 5, 2013
I'm jumping to the forms development and going to try what I need via queries and SQL. I'm trying to do a series of cascading combo boxes which have worked out fine, right till I hit the first junction table.
I will include the VBA code below as well as a screenshot but here's how it goes.
REGION cascades down to COUNTRY cascades down to PORT and then to CARRIER.
This is for a shipping program.
When it gets to PORT and are trying to cascade to the various CARRIER's thats where it hits a junction table of PORT_CARRIER.
Here is REGION to COUNTRY:
Me.cboCountry.RowSource = "SELECT COUNTRY.CNTRY_ID, COUNTRY.COUNTRY FROM COUNTRY " & _ " WHERE REG_ID = " & Nz(Me.cboRegion) & _
" ORDER BY COUNTRY"
Me.cboCountry = Null
COUNTRY to PORT :
Me.cboPort.RowSource = "SELECT PORT.PORT_ID, PORT.PORT FROM PORT " & _
" WHERE CNTRY_ID = " & Nz(Me.cboCountry) & _
" ORDER BY PORT"
Me.cboPort = Null
PORT to CARRIER:
Me.cboCarrier.RowSource = "SELECT PORT_CARR.PORT_ID, PORT_CARR.CARR_ID FROM PORT_CARR " &_ " WHERE PORT_ID = " & Nz(Me.cboPort) & _
" ORDER BY CARR_ID"
Me.cboCarrier = Null
PORT to CARRIER is where the problem is.
It populates the combo box, but with the ID numbers instead of actual CARRIER names.
(the Junction table are two PK fields and are lookups to PORT in PORT table and CARRIER in CARRIER table.)
Is there a magic spell for cascading combo boxes when you hit a junction table?
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Jul 19, 2014
I need a table structure that will allow me to have a repair log data entry form with 3 cascading combo boxes on the repair log data entry form. There can be many repairs for a specific job but most of the time there will be one repair per job and 1% of the time two or more repairs for a specific job.
I am pulling a report based on a query that will show the repaired location, facility type, repaired item, repaired component on that item and other details related to the repair.I uploaded an empty database with the structure.
Cascade levels
I. Facility Type
II. Item by [I]
III. Component by [II]
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Jan 31, 2006
Hi everyone,
I have a relationship between Market data table and Trade table which is One to Many. Market on the One and Trade on the Many.
However I just found out that I am unable to enter information into the Trade Form without entering information into the Market Form first.
I would like to enter info. into Trade Form/tables independent of whether I enter info. into the Market Form/table, but I still need to have the relationship of One Market data to Many Trade date.
Thanks
dfuas
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Aug 20, 2007
I have 2 excel sheets that I have imported as external data. I created a relationship between the 2 tables on part# field that is common to both. The relationship is to take all info from A table and only those from B table that match. The part# field is set to text in both tables. When I run a report that merges the 2 together a significant # of parts in my field change to a negative number. For instance the part# in both tables are 12345678 it is changed to a random -3452345 number..
Any ideas?
Please help
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Jun 1, 2005
Hello everyone
I have read the FAQ on cascading combo boxes and have managed to apply the theory to my DB's data input form (frmDataEntry) which is very cool and prevents a lot of errors however in doing so it no longer populates the underlying table (tblProductionDetails).
I am at a loss as to how to correct this as you can see from the example I need the customer and description field to be populated with the correct data rather than the fields I am using to make the cascading combo boxes work.
Any help would be greatly appreciated
Regards
Adrian
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May 15, 2013
Currently, I have a form with a combobox that lists all of the names of the tables inside my database. Depending on the table selected in the first combobox, I would like to have another combobox which allows the user to choose from the field names inside that table.
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May 31, 2005
Hi, I want to create an access app that will allow a user to see the number of pages printed by various printers.
These are the data that I have:
Model Type (various are available)
Printer's name (unique to one printer)
IP addr (unique to printer)
Quantity printed (such as Single Legal, Double Legal, Single Letter,etc)
This is what I have (2 tabels with 1-many relationship):
Printers
PrinterID
Model
Name
IP
ModelTypes
ModelID
Model
Now, where do I place the quanties of paper printed? Do I just leave it in Printers?
Thanks.
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Aug 15, 2006
K,
Maybe a noob question, but I'm still learning access (I know a little late at the age of 37, but better late then never).
I have a form with several tabs, linked to a table with employee information, works like a charm.
Now, my last tab is called settings, maybe no need to say that the information from this tab needs to be called from a different table called settings.
Certain information, like version number, department, etc I want to display all the time in the header and I want to be able to manipulate that information through the settings tab.
I definately don't want any relationships with the employee table.
Is there a simple way to achieve this, I tried drag and drop but this leads to errors, so definately I do something wrong here.
Much appreciated,
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Aug 26, 2014
My problem is displaying data in many-to-many relationships.
There are three main tables: tblShops, tblOwners and tblMarketingEvents.
These are linked through two junction tables creating two many-to-many relationships:
1) Each Shop may have more than one Owner and each Owner may have more than one Shop.
2) Each Marketing Event may reach more than one Owner and each Owner may be reached by more than one Event.
Now I want to display for each Marketing Event:
1) the data of that event, (tblMarketingEvents)
2) plus the owners reached in that event, (tblOwners)
3) plus all the shops owned by the owners reached in that event. (tblShops)
Preferably, I want to display more than one record at a time without repeating any information.
Is there a way to display the data like this?
I tried a query: it gives the right data but does not display it as I need. It repeats the data from tblMarketingEvents and tblOwners for each shop.
I tried a form with subform: it can only display one record at a time and is hard to work with (printing etc)
I tried a report with grouping levels based on the query: Again, right information, wrong display. I need to group according to the records of the MarketingEvents table and not just according to a single field.
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Mar 12, 2011
I have been trying to modify a sample database to suit what I want to do but I am getting stuck on the very first part cascading combo boxes i want to open a form and add multiple items to a table - first i want to select, from a combo box a department - then select a supplier from all the suppliers/manufacturers related to that department then select a stock item based on the description from all the items available from that supplier
I have attached the database I am using to modify and my database.
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Jun 4, 2013
I have created a form with two subforms. The context of this is a litigation database. The main form is for testimony. Among other things, it includes a field for a question and an answer. Any given piece of testimony may relate to one or more documents, and any document may be referenced in one or more pieces of testimony. So have two subforms, one for documents produced by the Plaintiff, and one for documents produced by the Defendant. It worked out easier that way because I originally created indices of those documents in separate Excel tables which I then imported to Access.
So the relationship for both document tables relative to the testimony table is many to many, which is established using two junction tables.
I also have a combo box in each subform where I can autofill fields based on selection of the document number.
My problem is that while the combo-box works great, once I select a document in the subform, that selection is carried over into the next entry of the master form, but also the selection is not retained in any of the master forms. So I can browse the document listing from any entry in the master form, but I can't get the document selection in the subform to stick and create a lasting relationship to a given record in the master form.
Is my problem that it is just impossible to have a subform based on a many to many relationship, or is it in the parent child relationship of the form and subform, or is it in the properties of the subform?
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