Tables :: Create Primary Key From Foreign Key?
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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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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Apr 12, 2008
it wuld be helpful if any of u can tell me how to link tables to query using primary key and foreign key or web page where i can solve my problem.
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Jun 6, 2005
Hi All, Me Again :eek:
I have another issue that has stumped me:
On the mainform [frm1930Census] I have a couple of subforms [sbf1930CenHeader & sbf1930CenDep]
The primary key [FTMID] has passed from the mainform to the 1st subform [sbf1930CenHeader] correctly. Using the one to many relationship attached by the [FTMID] field.
The problem is the primary key [1930CenHdrID] from the subform[sbf1930CenHeader] should then travel to [sbf1930CenDep] which it does not. The relationship between the two subforms are one to many focusing on the [1930CenHdrID] field/
I am using the following code:
Private Sub Ctl1930CenHdrID_BeforeUpdate(Cancel As Integer)
Me.1930CenHdrID = Forms![frm1930Census]![sbf1930CenHeader].[Form]![1930CenHdrID]
End Sub
Any help will be most appreciated.
~VanEpps
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May 30, 2005
I`m designing a database in MS Access '97.
A lot of the tables I`m using have multiple primary key fields.
How is it posible to create one relationship between 2 fields in table A and 2 primary key fields in table B and force integrity?
thx in advance
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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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Sep 11, 2014
I am trying to get the Primary Key value from one form to auto-populate the foreign key value of a second form
I have tried the following code in both the second form's Load Event and the Foreign Key Control Got Focus Event but nothing doing...
Me.[NHS Number] = Forms![frm_Patient_Data_Entry]![NHS Number]
I am new to VBA so not sure of the referencing technique but have looked at the MVPS Form 'referencing' sheet to no avail.
I keep getting an error message (2450) MS Access cannot find the referenced form "frm_Patient_Data_Entry"
I have checked spelling throughout countless times so there must be something wrong with my referencing I guess.
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Jun 6, 2012
I have data in a table that looks like the first table and I would like to write a query to update the sequence so it looks like the second table.
PersonID
Color
Sequence
1
Red
1
Blue
1
Green
2
Blue
3
Red
3
Blue
PersonID
Color
Sequence
1
Red
1
1
Blue
2
1
Green
3
2
Blue
1
3
Red
1
3
Blue
2
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Nov 7, 2012
Is it possible for the primary key of one table to act as the foreign key in another table for more than one columns? What I'm trying to do is create a table for a Committee which will have 1 student and 5 professors! So Can I import the faculty ID for each of the 5 faculty members?When I try creating the second relationship, access automatically creates a new Faculty table for the relationship!
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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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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 9, 2005
I have a rather interesting situation involving creating a primary key. Basically I have two tables.
Table 1
Date, Customer, Part Number, Work Order, Qty tested, qty failed, tech name
Table 2
Defect, reference, quantity(defect), defect cause, part number, work order
The ideal relationship I want to create is that for every Table 1 there are multiple table 2. Regular one to many relationship. The problem is that in the first table it is possible and probable that there will be duplicate records because of the process. The test parts by individual carts, but often they're exactly the same parts with same work orders and same everything else. How should I go about doing this. I don't want to just create an autonumber for each record if possible. Any suggestions?
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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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Sep 2, 2015
can I create primary key with macros automatically.
I have created table with Query and I need primary key in this table. I put new field for primary key but after restarting it was delete every time.
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Aug 12, 2013
In a Related Tables, you need to enter a FK to link to the other table.You either key in the FG from memory..The standard procedure is to design the field as combo box AND use SQL to select the field that will input the ID of the other table. So, if you want to input foreign key 3 , the combo box will display what 3 is then when you selected Access will insert 3 for you.
My question is since I can later on, edit the table and change the the value to another value, and mess the whole thing up!!! HOW can I lock my first choice so it will stay unedited ? My second question is: Is this the only way to input the FK if you do not remember the exact ID number or there are thousands of records in the related table.?
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Nov 28, 2014
I have two Tables, Table A and Table B...Table A and B have a one to many relationship with A (one) and B (many).I have a Master form that displays information for Table A. Also, I have a subform within this Master that displays information for Table B.
As I scroll through the records of A, you can see the 1-many relationship elucidated in the subform with many being displayed for Table B.I run into a dilemma, though, when I try to ADD a new record to Table A (and in turn Table B).When I add a new record, there is no Primary Key left to be displayed since this primary key is generated from a query.Hence, when I move to a new record, I can not save the record because there is no primary key. Since there is no primary key, there is nothing that i can input into the subform either. I want to create the primary key from values entered in the field. However, i CAN NOT create a relationship with an expression for field values.
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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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Nov 29, 2005
This is a real mind bender.
I am running a2k. I am merging two databases. table1 is in the backend database. table2 is linked to the second database.
I run an append query to add table2 entries to table1. The append fails for 96 recs saying key violation. Turns out I can rerun the append if I drop the zip code field.
I then try to manually change the zip code and receive the duplicate values in index, primary key, or relationship.
I ran a compact & repair the databases, still no go. I can't edit the value of the zip code. I import the table to a new database. Still can't change the zip code. I drop MANY of the indexes. Even the index on the zip code field. Run compact&repair. still getting the index message. I even re-imported to a new db again. Still same error message.
I may start again by importing JUST these two tables to a new blank db and see if I get the same issues. I'll keep you posted...but maybe there is someone out there who has seen this error before.
fyi-if I enter a new record, the autonumber field correctly increments to the next available autonumber field. (I say this because of another thread on this matter w/ autonumber fields and bug in A2003)
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Aug 4, 2015
In table 1 fields Factor, Aggregations, Stat, and Days Back are fields that make up a multi-field primary key [URL].
I want to create a relationship between that multi-field primary key and another table, call it table 2, and make it a one-to-one relationship.
How do I do this in MS Access 2013?
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Apr 13, 2011
Is there a way to create a relationship so when a new record is entered into the main table it automatically creates a new row/record in the related table with just the foreign key entered?
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Aug 25, 2014
I need to create a query that strings data horizontally that corresponds to the primary key.
Example of what I am looking for
Fields:
Part_No,
Mfg_No,
Mfg_Name
Query Columns: Part_No, Mfg_Info (Mfg_No: Mfg_Name)
Also if the part_no (primary key) has multiple values I need the data to string horizontally like this:
Part_No, Mfg_Info (Mfg_No1: Mfg_Name1),
Mfg_Info (Mfg_No2: Mfg_Name2).......
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May 1, 2014
i have 4 supplier tables with identical field names but different databases in sql.I want to have them all in one table and only want the information for reference i do not want to edit any of the data.I need to create a new primary key number for the complete table. The data will need to be refreshed as the data comes from MMS Sage looking at company PLsuppliers.
I have tried a linked SQL union view- but this has no primary key.I need to keep the Primary key consistent as the data saved in other tables will use this field.The overall goal is creating a Purchase order system and this list will be my complete supplier list.
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Dec 20, 2012
how to change default currency in Access 2013 to a "foreign currency" (i.e. to Indonesia Rupiahs) without changing control panel (Region/Language>currency) - now setup as USA ($US)?
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Feb 1, 2008
Hi,
I need to create a table with 2 sets of different information both referring to job types. the problem is that i need the autonumber which created the job number to scale together. so both tables have a primary key of "job number" and i want the autonumber to only ever use 1 number in both tables.
e.g.
job type 1 - autonumbers - 1,2,3,4,6,7,9,10
job type 2 - autonumbers - 5,8,11,12
is there anyway of achieving this?
Any help greatly appreciated
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