Update Records With A Circular Many To Many Relationship
Feb 27, 2006
Hi Foks,
I'm sure this has been asked and answered many times but I'm not having much success in searching for it as I can't think what to put in the search engine. My apologies in advance for the longwindedness of this posting.
Anyway, I have a database for tracking projects. As the projects evolve, they are sometimes amalgamated, split, dependant on other projects or implemented under a common contract with one or more other projects. Thus, a project can have none-specific relationships with multiple other projects.
To accomodate this:
I have a juction table, tbl_Related_Projects, with fields Project_ID and Related_Project_ID set up as a joint PK.
The PK of tbl_Prj_Details has 1-to-many relationships to both of these fields to create a "circular" many-to-many relationship between the tbl_Prj_Details.Project_ID field and itself.
A comment field in tbl_Related_Projects describes the nature of the relationship between the projects.
;) I hope I you're still with me and following this!;)
On my fdlg_Prj_Details, I have a subform for tbl_Related_Projects. A user can select related projects from a drop down list (Combo Box). So far so good.
Here (finaly :eek: ) is the question: When a user selects a related project (Project B) on the related project subform for Project A, how do I get the reverse relationship to show for Project B i.e. Project A is to appear in the related projects subform of the Project B record, along with the same comment?
I can't even begin to think how to achieve this but as it is a relationship issue, it must be what relational databases are all about and have been solved many times.
Currently a user must select the appropriate project in the related project subform for each record and enter the comment twice. The possibility and liklihood is that the relationship will not always be noted for both ends i.e. A will be related to B, but B not related to A.
:cool: Small caveat for any helpers here, I can copy, cut, paste and stumble/modify code, but at this early stage in my database carreer (ha!), I cannot write it from scratch - too many traps for beginners.
Having re-read this a number of times before posting, it is occuring to me that this is a more complicated problem than I thought it was. Many thanks in advance for any help and advice.
Regards,
Keith.
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Jan 10, 2007
Hi all,
I have a query which i'm trying to link to a listbox on a form.
One of the colums i'm trying to get in the listbox is from a lookup.
It should return either "in" or "out" but is returning the number values 1 & 2.
so....
i'm trying to write some criteria in my query that says if=1 then "in" etc
Here's what i've got but i'm getting a circular ref error.
In-Spec / Out of Spec: IIf([In-Spec / Out of Spec]=1,"IN","OUT")
Can anyone help please.
Cheers,
Spinkung. :)
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Jul 12, 2005
circular references caused by alias 'filed name' inquiry definition select list? What should i do
thanks
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Nov 8, 2005
I have (for this post) 2 tables.
department
====================
pk | d_id
--------------------------
| d_fund
fk1 | d_status_code_id
| d_department
fk2 | d_building_id
fk3 | d_contact_id
fk4 | d_note_id
| d_modified
| d_user
contact
====================
pk | c_id
--------------------------
| c_banner
| c_last_name
| c_first_name
| c_middle_initial
| c_job_title
fk1 | c_department_id
| c_department_text
| c_email
| c_phone
| c_modified
| c_user
As you can see there is a circular reference between them as each need the other's pk to ref a contact and department respectfully.
This will cause a problem during data entry will it not?
And if so, would removing the "req" status on either on remove the issue?
thanks
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Mar 10, 2008
Hi,
I've created a db I plan on using for pricing out parts, the issue I'm having is that I'm getting a circular reference error.
The way my db is setup is like this Partstbl contains the information for all parts made. Some of these parts can have subassemblies and these parts will also be in the "partstbl". In another table called "Subassemblytbl" I choice the parts from the "parttbl". Parttbl has a one to many relationship with "subassemblytbl" The error happens when I created a query that was to calculate the part cost. This cost would then be displayed in the subassembly subform on my main form. I'm having some difficulty explaining this
if anyone can help I'd really appreciate it
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Feb 3, 2014
This is how I have my database set up currently, except the part highlighted in red.
I was asked to see if I can use the CAT (one) to narrow down the CLIN (to many) and this is how I think it should be structured. Is it okay to have this kind of circular relationship within the database?
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I have the following tables:
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I want to be able to edit the fields from tblInvoice in the query.
If I create a totals query (qryInvoicePrePaymentsSum) on tblInvoicePrePayments, using the fields InvoiceId and PrepaymentValue, and then create another query with tblInvoice & qryInvoicePrePaymentsSum, the fields in tblInvoice cannot be updated!
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I created a query that pulls information from 2 other queries and everything was going fine until I saved the query. I now get a circular reference error
SELECT [CashValue Link Query1].Facility,
[CashValue Link Query1].[Financial Class],
[CashValue Link Query1].Date,
[CashValue Link Query1].Date,
[CashValue Link Query1].[Total A/R],
[CashValue Link Query1].Current,
[code]....
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Mar 19, 2007
Hello all,
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3. Borrow
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I ahve another form to return a DVD. I view the records from the borrow table, and once found what i want there is a button which deletes the record from the borrow table. Sadly, when i press this button, not only does it delete the record in the borrow table, but it will also delete the record from the DVD collection table.
I have tried everything i can think of, and i don't want to change to change the design as i have found this mnethod very easy to generate reports and the like. Any help??
Thanks
EDIT: the button i used was from the wizard that comes up when you create a button.
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Oct 15, 2015
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Gordon
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Dec 30, 2013
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See attached picture where I am stuck at?
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Jun 28, 2005
Hi Guys,
I have got a query that updates details from one table2 to table1, "Reference" is the primary key and this is what the query uses to determine which need updating.
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Any suggestion guys & gals?
Many thanks
Tim
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Aug 22, 2013
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Jan 15, 2005
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Sep 22, 2006
Hello all...
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Jan 25, 2007
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Feb 20, 2005
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Nov 2, 2005
Hello -
I have a couple questions I hope that you can help me with. I have an asp page that is retrieving a bunch of records from an Access Database based on a field value (in my case its based on Department). They are then placed in a table format in the asp page. The user can then modify one or many records. Everything was working fine and then we upgraded our IIS Service from IIS5 to IIS6. Once we did that I started getting errors. I was able to update certain departments and not others. This told me the code was good and that the database permissions etc were good. It has to do specifically with the value or similar. I looked further and came to realize that it appears there were to many records to update. The Departments with a few records updated fine. THe ones with 500-1000 were erroring out. I went into the database and deleted the records from 1000 to 500 and everything works.
Does anyone know if there is a record limit to update?
Is there a function on ASP that I can use like Me.Dirty that will search first for updates and then just update the single record?
Is this a result of IIS6?
Here is a bit of my code: This is the area that it is bombing out on....I am not an expert and believe I might have hit an ARRAY size limit. Does that make sense?
Is there an ARRAY size limit?
THanks in Advance
arr_ids = Split(Request.Form("Auto"),",")
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Dec 27, 2005
Hello friends,
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