Tables :: Creating PK With Calculated Autonumber To Create Relationships
Sep 24, 2012
I am trying to create four tables: Company, Contact, Activities, and Opportunities.
I want them to relate hierarchically. A Company can have many contacts, contacts can have multiple Activities and Opportunities. But you can't have contacts without a company and you can't have Activities and Opportunities without having a contact. I want all PK's in all tables to link to one another, that you cannot create one without the other.
How I can do this in Access 2010?
YYMM00000-000000-A0000
CompanyID-ContactID-ActivityID
or
YYMM00000-000000-O0000
CompanyID-ContactID-OpportunityID
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Mar 17, 2008
I have a table where one field needs to be an autonumber, however, that autonumber needs to be calculated. This field is not based on any other information in the database, but there's a very complicated mathematical process behind it, which I'm figuring out...I just need to know once I get that code complete, how do I tie it into the table?
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May 4, 2013
I created a database with 10 tables and 8 relationships. Then, I learned about the Autonumber field type and decided that I wanted that to be the primary key of one of my existing tables, for a field that was already linked to 2 other tables. I had to delete the relationships and the original field to make the change, and Access said it had to delete an index, too. Now, Access won't allow me to re-establish those relationships.
I found that I had to change the fields in the other tables to match the Autonumber type and name of the original field, but now I am getting an error message stating, "Invalid field definition 'CustomerID' in definition of index or relationship. What does that mean? The field types and names are all the same.
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Oct 30, 2012
I was wondering how to create relationships between tables?
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Dec 1, 2014
My database exports data to one of our customers who then inputs the data into their system.
One field i have is "RO Number" which i have as an autonumber which works for the purposes of my part of the system.
However they have it set as "RO9999", (Their system has been set up for years, we are a new "branch") but they aren't in access.
They want the RO number to be a running serial from RO30000, RO30001 etc
The data in entered on a form.
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Aug 2, 2013
I'm trying to create multiple relationships between the same two tables, but I run into problems every time I try. I'm using Access 2007.
Specifics:
I have a table with information on meetings and there are two hosts. So I have fields Host 1 and Host 2. I have a second table that lists possible hosts and their personal information. I have a relationship between table 1 "Host 1" and the Host in table 2; I cannot create another working relationship between table 1 "Host 2" and the Host in table 2.
how I can get that to work? With just the one relationship, I can go to table 2 of the hosts, click on their name, and see all their meetings.But if I add another relationship, it takes out all of the information. I've been working on this for over an hour,
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May 3, 2015
I'm thinking about creating temporary (while db open) relationships between tables, since transfering tables is possible only if no linked relationships are present. However it's important to preserve in some cases referential integrity.Looking online, I found this code:
Code:
Public Function CreateRelation(primaryTableName As String, _
primaryFieldName As String, foreignTableName As String, _
foreignFieldName As String) As Boolean
[code]...
Even with the comments I don't really understand what exactly this code does or doesn't do.I tried the code. It seems (?) to create a relationship. Since the relationship doesn't show up in the relationships table, I'm not really sure if it's there.
- why it's not visible among other relashionships (or is it me?? maybe, it wasn't the code that was working but the query...)
- how to implement referential integrity
- what's the behaviour of this supposed relationship. Is it permanent or not? If not when is it deleted?
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Feb 12, 2014
When I tried paste some data using front end to my database, Access showed error (can't create record because data would be duplicated). I thought it's impossible because it is autonumber field. So I checked it (manually). I did copy of my database and then for testing, I created record. I was shocked. Next record should has a value of "160" but Access gave "130" then showed an error "Can't create record because data will be duplicated". Of course after compact and repair everything is fine.
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Feb 18, 2008
Hi,
I have two tables:
Table A provides total sales volume of the UK shoe market from 2000-2007.
Table B provides the sales volume of different shoe manufacturers from 2000-07.
I want a third table created, called Table C. This should look exactly like Table B but instead of sales volume it shows percentage sales that are calculated by using the figures in Table A and B (i.e. [sales volume from Table B/total sales volume from Table A] * 100).
Could someone point me in the right direction please (assuming that such a table can be created, based on a calculation of figures in other existing tables).
Thank you.
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Aug 19, 2013
The interface being used is a main form with various tabs and a subform on each of these tabs.
There is one field ('max power density') in my database that is calculated using 'Max Rated Power' and 'Cylinder Capacity' however these are in different tables and subforms. The 'max power density' and 'max rated power' are in table and subform 1 but 'cylinder capacity' is in table and subform 2. Is it possible to keep them in separate tables/subforms and still calculate the field?
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Feb 11, 2005
I am using SQL 2000 and have two tables that I want to create a relations ship, so that when I add data to one it gets added to the other.
Table_Main
QuoteID int
PartNumber nvarchar
(both make up key field)
Table_Secondary
QuoteID int
Item nvarchar
(both make up key field)
When I use the database diagram in MS Access (ADP not MDB) I get:
"The columns in Table 'Table_Main' do not match an existing primary key or UNIQUE contraint."
Othere then then actual name of the filed, they all match, what gives?
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Nov 20, 2004
I'm a student working on a project in which I've inputted information from course evalution forms into new databases. I have a database for each semester and then tables for the individual workshops. Problem is, these are many to many relationships and there is no real way to link the tables. My friend suggested a redesign, which would essentially mean splitting up the information for an individual form. (i.e. course instructor in one table, comments on workshop in another table) I have a big problem with this because I would be eliminating peoples' ability to see all the information for one workshop in the same table, which in my mind is just as useless. I'm interested in hearing your thoughts if I'm taking the right approach. Thanks.
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Oct 8, 2006
I have an assignment with absolutely no directions other than
Quote: 1.Open the Relationship window
2.Create the following relationships:
The strDeptCode field in tblDepartment should be related to the strDept field in tblHumanResourcesData
The strEmpID field in tblPersonalData should be related to the strEmpID field in tblHumanResourcesData
The strParkingLotCode field in tblParkingInfo should be related to the strParkingLotCode field in tblHumanResourcesData
3.Save the relationships and close the Relationship window.
Where do I go to begin this? I couldn't find any real help with the help sources in Access. Nothing that made any sense at least.
Oh - I am using Access 2003 by the way.
Any help or direction would be extremely appreciated!
Thanks,
Ryan
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May 4, 2007
Any ideas on tagging my primary key (currently autonum as a data type) with an "M" on the front of it. I guess i wanted to keep it as autonumber so i wouldn't have to key in a value
Thought maybe i could create a new field and do an "M" & [ID] in the default value where [ID] is the autonum primary key field but I guess I'm not doing it right - get an error trying to save saying it can't find the field [ID]
thanks for any suggestions!
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Dec 20, 2005
Hi,
I have two tables i would like to create a relationship with but the two fields that i want to join are not exactly the same e.g
Table 1
0000111111
Table 2
111111 ABC
The key piece of information that i would like to link together is the 111111, in SQL i would just type "WHERE Code LIKE '*111111*'" or something like that.
Is there anyway i can create a relationship based on the data above?
Many thanks
Tim
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Oct 19, 2006
I need to create an incrementing number to be used as a primary key in a table, based on a few variables. The format will be YYMM0000. It represents the number of units received each month.
I can come up with the formula to create that string no problem, but I need to create some code to check the table MAIN for the field TRACKER_ID to find the last number and increment it by 1.
Can anyone help? :confused:
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Aug 23, 2005
I am building a DB for a nonprofit, and trying to figure out how to create a family relationship for contacts. Basically, it will be for mailing- so they receive only one, and to record donations.
At times, John and Mary Smith will donate together, and sometimes John Smith will donate in conjuction with an organization.
So, I would like the family relationship to be with John and Mary Smith, but also would like to be able to track that John Smith, but not Mary, is a member of that particular organization.
I would like the donations that John & Mary make together to show up in both their records, but the donations that John makes with an organization to show only in his record and the organization record.
Is this possible to create in access? I'm a bit stumped at this point.
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Mar 2, 2005
I currently have a few tables that use an autonumber as the primary key, however, I would like the autonumber to start with a series of letters if possible. For example: instead of it creating an ID of 1, then, 2, 3, 4, and so on, I would like it to append lets say "ABC" to the front of it; ABC1, ABC2, ABC3, etc.
AP
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Dec 20, 2005
All,
I have trawled boards and sites, but cannot find the answer!
I have a make-table query, and I wish to create an AutoNumber field.
Now I know that if you put fieldname: "" , a Text field will be created and if enter fieldname: [] then a Binary field will be created.
Is there a code I can use to create an AutoNumber field?
Help appreciated!
Regards,
Jempie
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May 8, 2013
I need to create a Autonumber field in a table with the following starting value 13-642-2000.
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Feb 13, 2014
I have two tables that look like this:
Table 1
LOCATION NUMBER , SIZE
1.12 ,100
1.13 ,100
1.14, 12
1.15, 12
1.16 ,150
1.17 ,150
1.18 ,100
Table 2
ITEM , SIZE
A , 12
B , 12
C ,100
D ,12
E ,100
F ,100
G , 150
I would like to do a query that Joins the "Size" in each table, and then matches an "Item" to a "Location". However, because of how a normal join works, I cannot seem to figure out how to limit the "Location" field from producing duplicates in the match.
I only want to have 1 location for every 1 Item.
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Mar 30, 2012
HR.zip. I'm trying to create database for HR and all the tables has to be linked with on table "PFEmployees (one employee has to be linked with all other tables "beneficiary,disciplinary,caruser,otherinfo etc...). Is it possible to do it.
Look into attachment relationship. I am really stuck with this.
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Apr 18, 2006
Hi,
example:
SELECT tblFalls.Guest_Name, [Account_Number], Count(tblFalls.Account_Number) AS Falls
FROM tblFalls
GROUP BY [Account_Number], [Guest_Name];
Gives me:
Smith, Joe; M698, 1
Blinke, Frank; M686, 2
Neal, Bobbie; M648, 1
I need ot to give me,
1, Smith, Joe; M698, 1
2, Blinke, Frank; M686, 2
3, Neal, Bobbie; M648, 1
each time i run the query i need to list that guests, their number of falls and assign each unique guest a number starting with 1 on up...
How?
yes, yes, i know how to do it in a report, but I need right now to be able to do it in a query alone.. anyone?
I tried:
SELECT Sum(1+), Guest_Name, Account_Number, Count(Account_Number) AS [Falls]
FROM tblFalls
GROUP BY Account_Number, Guest_Name;
=p no luck.. though it looks neat.
I also tried writing a function
Public Function GetQryNum() As Integer
If IsNull(gQryNum) Or gQryNum < 1 Then
gQryNum = 1
GetQryNum = gQryNum
Else
gQryNum = gQryNum + gQryNum
GetQryNum = gQryNum
End If
End Function
SELECT GetQryNum() AS GuestIndex, Guest_Name, Account_Number, Count(Account_Number) AS [Falls]
FROM tblFalls
GROUP BY Account_Number, Guest_Name;
But all i get is a '1' in every row.
Any ideas?
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Feb 18, 2007
Hi I am trying to make a database, In which I have a table linked with the form.
There are two fields in the table 1.Serial Number & 2. Current Year
I want the serial No. field to be incremented after every record is added & Also the numer should start from "1" again as the Current Year Changes.
Can somebody help me in this.
I am learning new things in access & not that proficient. But i love to work in access.
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Dec 4, 2004
Hi,
I'm new to this forum and have a question:
I want to create a table with an Autonumber field using a SQL statement,
in Microsoft Access Database, something like this:
Cnn.execute "CREATE TABLE newtable (id Long, Name Char(100)) "
is there something to put in place of "long" to make the field autonumber?
I tried the word "autonumber", but did not work.
Many Thanx.
Hadi.
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Sep 12, 2013
I created a database of "My Cars", "Television", and "Wines" and a Trouble Reports(TR) for each. I have a field TR on each and for now a user can fill it up with number i.e first TR is 1, second Tr is 2 etc etc. I want it automatically filled automatically not manually. However, I want it to do the same for "Television" and "Wines" when I write Trs on them. I am a rookie and I dont know how to do it I attached a copy of the db I created.
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