Tables :: Inserting Foreign Keys Within A Text Field?
Aug 28, 2013
I've got a table - "Products" - in my database, with a text field - "Info" - which contains info about products.
Within this field I would like to have footnotes. To do this, I think the best way to do it is by putting numbers inside the text at the location of where I want the footnote to refer to. These numbers will actually be foreign keys to a table called 'Footnotes'.
I can then program the forms and reports to show any numbers as superscripts or whatever.
(Of course, if the user will actually want to insert a number into the text field which is NOT a reference to a footnote, I will have to make a workaround e.g. by making access put a symbol in front of the number, so access will know the number is just part of the text (and I will program the form to not show the symbol in front of the number)).
Is it wrong to have foreign keys within a text field? I think if executed correctly, it should work perfectly.
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Sep 25, 2006
hi
i need to create a table, i've figured out to make LastName the primary key. But im not so sure about the foreign key, and whether it is necessary to put it into the table in order for all my tables to relate? Sorry if this doesn't make much sense.
Also, to clarify.. 3NF primary keys in one table cannot be used in another table??
thanks
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Sep 22, 2007
Hi there,
I am trying to model my database to create relationships between different tables in my database. During the process of doing so I ended up having one primary key in table A linked with to foreign keys in two different tables ( table B & table C) and both of those two table are junction tables to break out many to many between many other tables
Now for some reason!!! I feel that there is something wrong with my logic mapping and modeling of the relationships between tables due the fact of having one primary key linked to two foreign keys in two different tables :(
Is my intuition is right? should such case be considered as indicative of wrong modeling of relationships between tables in a single database
And if so what is the disadvantages of that link (talking down the road) when the database if fully populated? :confused:
By the way I am new member and new to database, so please take it easy on me :o
Many thanks
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Aug 29, 2013
Right now, I have 4 related tables. There's a table with companies, one with people involved with companies, a table linking the two by having foreign keys of the company number and people names, and a table that indicates directors and their alternates.
Since there's a one-to-many relationship for companies/people to company-peopleID (A person can run multiple companies, a company has multiple directors, it's easier this way), a person's name can appear multiple times, as can a company, within that table.
In a company, a director may or may not have 1 and only 1 alternate director to him/herself. So, I thought the easiest way was to put an autonumber in the Company-personID table and have a table (alternates) that had two fields, "alternate" and "director", both using that autonumber to link them. However, it appears as though I can't link the same primary key twice to two foreign keys of the same table.
[URL]
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Aug 25, 2006
Hi,
While designing a database, I came up with 3 different foreign keys in one table. I am afraid this is not right!
Is it possible to have this number of FK in one table or does that suggest a design flaw?
Any help will be very much appreciated.
B
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Apr 20, 2006
I'm not new to access, and I understand normalization at pretty much all its levels, but right now I'm curious about a situation that I have just come across. The first time I've been in something like this, so I thought I would ask.
This is the setup.
I have employees. They are apart of a shift and a budget. Shifts and budgets are completely independent of each other.
The database needs to keep track of shifts and budgets over time. Therefore, 1 to many relationship to shift table and budget table.
But, the database also needs to keep track of attendance. And the user wants attendance tracked by Shift and Budget.
Shift and budget are completely independent of each other.
Currently, I have the relationships set up like this.
Employee (1) ---(Many) Budget (1)------(Many) Attendance
Employee (1) ---(Many) Shift (1)--------(Many) Attendance
When a new attendance record needs to be added, both the key to the budget and shift are added to the attendance table. The key chosen is dependant onthe Employee chosen, and whether the budget and shift are the CURRENT budget and shift that the employee is apart of.
I thought of running a query showing budget and shift by date descending, so that the latest budget / shift would be displayed, and thus the most current (SUPPOSEDLY) But, if a user put in a different date, or screwed up on the date, then the incorrect shift and/or budget would be displayed.
Date stamping an entry was an option, but there needed to also be a user entered date as well, to specify WHEN a user began working in that specific budget / shift. Therefore two date entries would be required. Duplicate entries in most cases.
I therefore decided to go with a true/false yes/no checkbox. Where the current budget or shift would be checked, and all non current ones would be unchecked (false).
Currently, this is how the systems works. And it works well. But it is dependent on some form code I created to set the yes/no checkbox to true/false depending on the situation.
I DON"T like doing this. Am I missing a way to do this "correctly" where by Access would do this "automagically" instead of via my trick.
The ONLY issue really, is that when a new attendance incident occurs, the user needs to put in the incident to the approbriate shift / budget. And if the current shift / budget could automatically be displayed without user intervention (IE user has to pick the shift / budget from drop down box after looking up info etc etc) since the current information SHOULD be known.
I've never done a table setup where two foreign keys are the many side of the relationship in a single table.
It is currently working fine, and seems to do well, but I wanted to make sure with others who might have had this experience. And also, any "advice" / "cautions" for this kind of situation so I don't step into it deep and have to fix it later.
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Jul 8, 2005
More on the lot materials management program.
I have a series of related table:
Builder
Subdivision
Lot Number
Lot Option
Lot Materials Details
The [Lot Materials Details] table is populated by appending data from the [House Type Details] table tree as follows:
Builder
House Type
Elevation
Options Per Elevation
House Type Materials Details
The filtered Option Table in both branches determine which [House Type Materials Details] records get appended to the [Lot Materials Details] table.
The question is:
Is there any advantage, other than simpler queries later on, to adding the primary key from the [House Type Materials Details] table to the [Lot Materials Details] table.
It’s redundant because the [Lot Options Table] contains the [Options Per Elevation] primary key.
Any thoughts?
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Aug 5, 2007
Wow, I've found some good stuff here already... Thanks.
PROBLEM:
I have a table(we'll call it shipping) that has two columns FK'ed to another table (locations). My problem is I have no idea how to pull the information from the locations table into the shipping table.
DESCRIPTION:
My shipping table has a source and a destination column. Now, I have a fixed location list that applies to both columns and I'd like to avoid having a source tbl and a destination tbl... I'm an Access Neophyte to say the least (for now at least) but I have managed to put together a querie that pulls out most of the information that I need (name, phone number, yadda, yadda, yadda) but I can't seem to correctly link the FK's for the sources to the locations table as well as the FK's for the destinations to the locations table. When I run my querie I get an error or my Source(destination) column will display the correct information but the Destination(source) column will display ALL of the locations in the location table. Here's what I mean:
Source destination
detroit toledo
detroit cleveland
detroit San Diego
detroit London
detroit Paris
detroit detroit
Paris toledo
Paris cleveland
Paris San Diego
Paris London
Paris Paris
Paris detroit
.
.
.
The first and second source was detroit and Paris but the Destinations list all of the locations I have in the table.
How can I link two FK's in one table to another table in a querie?
Thanks.
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Oct 5, 2015
Can a table have two foreign keys?
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Jun 14, 2007
Hi,
I have to create a database for work and for my sins I have to use Access. We are running 2007 but I'm having some difficulty in creating foreign keys in my linking table.
I've searched their help guide and looked on the net but I can't seem to see how I physically create foreign keys.
My structure looks like this:
Customer
CustID (autonumber)
Cust Name
Cust contact
Cust email
cust version
no of users
other info
Modules
ModID (autonumber)
Module name
licensed module? (tick box)
MiscSoftware
MiscID (autonumber)
Software
Installed on live
CustMod
ID
CustID
ModID
MiscID
Thanks
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May 30, 2012
I want to create a combo box filter - easy enough usually
However - the field I want to use is a foreign key field which, while it displays a meaninful description - it stores the id rather than the text
I want to create a combobox filter, but when I do all I see is the id's - which are meaningless to the user.
Is there a way to get these foreign key filters to display a meaningful text description??
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Jul 10, 2014
I have what I think is a normalised database that uses foreign keys quite a bit.
For example if I had a 'contracts' table which refers to 'clients', then there would be a tblClients, where each client has a primary key. The tblContracts would then refer to the relevant client via that clients FK only which would be linked to the client's PK in tblClients via a one-to-many relationship.
If I need any user for any purpose to see contract related information that makes sense to a human being, I simply construct a query with the necessary relationships that will show client information alongside contract information by substituting tblContracts' client FK with required information from tblClients via the appropriate relationships.
I think that is reasonably basic stuff (hopefully correct practice!)
But what about when I come to import a block of new data that needs to go into tblContracts? I'm not going to be given a list of client keys (obviously) I'm going to given their real names.
MS Access has (in theory) all the information it needs (via the relationships) to substitute client IDs (keys) for their real names and thus slot these IDs into tblContracts with the new data as appropriate, but how do I make it do this? (I know it could kick out errors if there are any duplicate client names, but let's put that to one side for a moment).
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May 4, 2006
I need some help creating a simple datebase to store my documents and other knowledge objects. There are two types of
knowledge objects I need to store: Documents and Questions/Answers. For this reason I have created three tables: Index,
Question, and Document.
The problems I am encountering is that the ID field in the Index Table is the Primary and relates to the ID field in the
other two tables. So basically when I am entering information it can either be a question or document. I want to create a
for so that when its a question that I am entering it records the information in the question table and when its a document
I am entering it records the information in the document table.
I'm a beginner at using access and don't know VB or SQL. Any help would be appreciated.
Table Structure
Index Table
ID (Primary Key)
Link
Type
Source
Reference
Question Table
ID (Foreign Key)
Question
Answer
Document Table
ID (Foreign Key)
Title
Summary
Notes
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Mar 26, 2013
I'm developing a simple sporting records db. I have a 'Competitor' table listing competitors as follows: CompetitorPK, Name, Division, Club. I have a 'Contest' table listing contests as follows: ContestPK, Competitor1_FK, Competitor2_FK, Winner_FK, Score etc. My question is have I modelled tables correctly i.e. CompetitorPK will appear in three columns of Contest table. How do I define this relationship? What alternative is there to what I have done.I intend to use forms to populate both tables (independantly obviously).
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Jan 25, 2015
I'm trying to understand how data is passed using foreign keys.
I'm using Allen Browne's 'Don't use Yes/No fields to store preferences' at: [URL] ....
I've also downloaded his sample DB, RelationBasics, to use as a guide.
Attached is my version of the Student / Sport DB as described on the webpage.
I use 2010 at home (saved as 2003 version) and 2003 at work (JPNSE OS). Both result in the same thing.
The problem I'm having is I cannot get the actual sports to display in the combo-box, only the Sport_ID number.
I've tried building both forms with and without actual data in the TBL_Student & TBL_Sports tables, but no mater what the result is the same.
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Jan 22, 2013
I am using access 2007
i have a materialsUsed tbl that list all the materials used in a job and the quantity of each.
(ID
Material Code
Quantity
Unit of Measure)
I also have 2 look-up tables - 1 for the material codes and 1 for the units of measure
I have another table, priceperunitofMeasure
id
material Code (FK to material lookup tbl)
Unit of Measure (FK to unit of measure tbl)
Price
In my form Users will select material code from combo box - enter the quantity, and select a unit of measure from a combo box.
For example: they could enter the following :
Paint 2 gallons
Paint 3 tubes
Paint 1 pint
How do I lookup the price per unit of measure for each of these records in the price per unit of meassure table? The price per unit of measure table has 2 foreign keys.
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Nov 16, 2013
i have made two tables with data from an excel sheet. The excel sheet has many duplicates and im trying to eliminate this. The tables are:
tblTasks and tblTeam. Both have autoincrementing primary keys, and the tblTasks table has the TeamID (primary key from tblTeam) as a foreign key.
My question is, how do i populate the TeamID field via perhaps a query, as it is blank on all records. I have over 5000 tasks so a manual approach is what im trying to avoid. A sample of the fields in the tables is as follows:
tblTasks
TaskID - PK
Task Name
Team ID - FK
tblTeam
TeamID - PK
Team Name
there's also a Staff table. tblTeam has a one to many relationship with the Staff table. tblTeam also has a one to many relationship with the tblTasks table.
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Nov 8, 2005
Hello everyone - what I have is a a set of default text's that I need to be able to insert into a memo field - this is how I've set it up (Access 2000)
A table with the text fields in it called wordings
table comprises of
Id field
wordingnme (txt)
wording (Memo)
and I have a combo box on a form which looks up the wordingnme and hold this info - I need to have a button that will take this wordingnme and insert the wording that it relates to into the field of my record - Called Endor (memo)- I will have many text s say upto 50-60 but when I insert these into endor field I will probable only use say 5 or 6 at any one time on the record line so an example follows
line 45 in endor I wish to insert wordingnme "A" and then Wordingnme "B"
I also will do some free form type within this - any idea's :eek:
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Nov 30, 2012
Access 2010..One organization that we work with provides us with a block of numbers for each of the two types of contract products we order from them; we do order non-contract stuff from them also.The block of numbers are the same (i.e. 20000 to 30000 this year) for each of the two products. This means that each product can have the number 20000, for example. We call this the Tracking Number. If it is one of these products, we need to select the Contract Number.
For all other one off orders we have with them, we assign our own Tracking Number starting with 00001. This Tracking Number cannot duplicate unless it is one of the aforementioned two products.Both the Tracking Number and Contract Number are in the same table. The user selects the Contract Number from a form (connected to the Contract Number table that has all the details on the contract) and the Contract Number is populated in the same table that has the Tracking Number.Each order must have a Tracking Number (no null)..Not all orders need a Contract Number (null okay).The Tracking Number and Contract Number combination cannot duplicate.I tried setting the primary keys to more than one field in the table, but they cannot have null values.
If not... I have been working on Plan B.... an AfterUpdate on the form (either the form or a field... don't know yet) that looks at a query that only has results if there are duplicate values.
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Dec 7, 2012
Is there a way to insert a hyperlink in a field title on a table? For example, I have a field that is a check box for whether the person has taken a class. What I would like to do is insert a link in the field title for that class so I can click on it and bring up the supporting documentation in a PDF file for that class.
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Dec 16, 2013
i have build a small project using access 2003 and vba code one of the forms contains sub form the main form contain the main data about school and in sub form populate different > textboxes for details about classes my problem is how to fill these text boxes in this sub >form for different grades depending on id of main form and how can i change the values and >moveing first or next buttons these are simple picture
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Aug 27, 2015
I want a text box which is on a form linked to a table, to display a name using a foreign key as a reference.
I just had it semi working with D lookup and the whole database corrupted.
E.g. site_ID would be changed to Site_name on JobsF using JobsT as the record source
the site_ID is dependent on Job_ID
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Mar 8, 2014
In a nutshell, I have a form where the 'Record Source' is a table titled 't_02_0_Assets'. I have several fields in the table that have foreign key references that utilize the Lookup Combo Box display control to allow users to select from a drop down list in the form.
The issue I am having is that I can't filter the text in the foreign key fields (only the ID's ).
My attempted solution was to create a control on the form (text box) and bind it to each of the foreign key ID's using the DLookUp function and then reference this control in the filter code.
My question is... how do I reference this DLookUp textbox in my filter VbCode?
I have attached a '.jpg' image of various aspects of the form including the filter code on the 'On Change' event.
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Apr 4, 2013
I have two tables in my Db: tblMaster & tblAddresses. They are joined with a one-to-many relationship, with the addresses being the "one" side. Many entries in tblMaster have the same address.
I use a form, based on a query, to add records which creates the new vendor in tblMaster, and (if I have contact details), a record in tblAddresses. The problem is that while the PK is created in tblAddresses once I add the address info, the related FK field in tblMaster is not populated with that #.
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Sep 24, 2012
I have two tables tblPatients (pkUMRN) and tblAdmissions (pkAdmissionID, fkUMRNAdmission). pkUMRN is not auto-number, but is an 8-digit alphanumeric code unique to each tblPatients record. I have set up a one-to-many relationship between tblPatients_pkUMRN and tblAdmissions_fkUMRNAdmissions (each patient can have multiple admissions).
Is it possible to allow the entry of a new tblAdmissions_fkUMRNAdmissions to create a new tblPatients_pkUMRN? IE can you create a new primary key from a new foreign key?
Along a similar line, if the primary key already exists, how would you autofill a form with data from tblPatients when the tblAdmissions_fkUMRNAdmissions is entered in to the table?
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Mar 12, 2007
Hi,
I looked through your forums and didn't see this question answered. Forgive me if it is already there and I couldn't find it.
I have a report that I want to add a new text box to. When I create a form there is no problem choosing the different control sources of data that I want to put into the text boxes on the report. However, once I have created the report I can't seem to go back and make the data come through correctly if I am adding a new text box.
Example: I want to add a text box that is pulling through data from a field named "Duty" in a table named "Container_Vendor_Information". I put the text box into the created form and navigated through the control source choices to get the text box to point to where I want it to. Something goes wrong after that. When I close the form and try to reopen it I get a pop up box that is asking me to enter the parameter values for "Container_Vendor_Information."
I know there has to be an easy way to do this. All I'm doing is looking to add a new text box to an exsisting form. Any thoughts would be most welcome.
I would attach the database but I guess I don't have enough posts yet to have that option.
Thanks
Eddie.
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