Change Primary Key And Update Data?
Jul 25, 2007
Hello,
Firstly, I am very much self-taught on access, so there are several gaping holes in my knowledge, and my database structure is probably not wonderful! I have been learning as I go along, so in the initial stages I have built in several problems which I am now discovering!
My db is designed to track suggestions - i have a table where the idea, progress etc is stored [tblIdeasBank]. This contains an 'originator' (person's name) which is linked to a second table, where the names are stored [tblPeople].
Originally I set up tblPeople with the Primary Key as FullName (e.g. Joe Bloggs) (guaranteed to be unique with the small number of people that would be involved), and a second field called InitialLastName (e.g. J Bloggs). It is this second field that is stored in the tblIdeasBank. Data verification came from the user having to select a name from a drop down box, so there is no actual 'relationship' between the tables. (Didn't realise how useful they were at the time!)
The db has been so successful :confused: that it is now going to be rolled out across the company, which gives me two problems. To populate all the names, I need to import them from Excel, where I will have FirstName and LastName. I have now realised that it would be more sensible to just store these, and create InitialLastName where needed. Also, I may well have duplicate names, so I need to create a unique ID, and a proper relationship. (Yes, I know I should have done that in the first place).
So, I have:
tblPeople:
.FullName (Primary Key)
.InitialLastName
tblIdeasBank:
.Originator (stored as InitialLastName)
And I would like:
tblPeople:
.PersonID (Primary Key)
.FirstName
.LastName
tblIdeasBank:
.IdeaID (Primary Key)
.Originator (stored as PersonID)
With a One-Many relationship from PersonID to Originator
Any ideas how I would go about doing this and changing the Originator for each idea from InitialLastName to the relevant PersonID number, without corrupting the data?
I have searched through Google and various groups, but cannot find a useful answer, so any pointers gratefully appreciated!
Thanks,
Nick
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Oct 18, 2011
I am new to access 2010. I need to change the primary key in a table ("stations", Primary key is "station number"), because future entries will result in double entries for this primary key.
I have another table ("species&stations") which has records of Species for each "station number".
So I created a new Primary key for the "stations" table, now called "species id", being a bit better in defining a unique station (as it contains the year and the species number, i.e. "451_2010")
Now the table "species&stations" references/(is in relationship with) the old primary key, identifying a station number for each record.
How do I get it to recognise the new primary key from the "stations" table, and keeping the records (over 1000...) with all there info.
Approach so far: I tried to create a new field in "species&stations", which should look up the new primary key from "stations" and then autofill the field. i did not manage this though
I attached a screenshot to make the relationships more clear!
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Feb 17, 2008
i'm a Access novice. I have tables with existing data in numerical form, and would like to know how I can use Queries or VBA code to update these values into a new format in a new table. for example the original data might be of race type:
1 - caucasian
2 - african american
3 - hispanic 1
4 - hispanic 2
5 - hispanic 3
6 - other
and i want to regroup these into less types, eg:
1 - caucasian
2 - african american
3 - hispanic
4 - other
how can i achieve this in Access? i know how i can do this conceptually with "if" and "case" statements, but I have no idea how i can do this in Access. I don't want to mess with the original data, so please help with CODE or QUERY examples.
thanks!!
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May 31, 2006
How would I go about changing the primary key to a different field in a table? :o Thanks for any help!
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Jun 28, 2007
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Apr 21, 2006
Hey, I am getting a primary key violation when I try to run an update query.
My primary key is a combination of two fields, ScheduleID and SchedulePage. That way for each schedule I can only have one Page 1, one Page 2, etc.
When I want to insert a page (say a new Page 2), I need to update the table so that Page 2 becomes Page 3, Page 3 becomes Page 4, and so on.
The problem is, since it starts at the bottom, when I tell it to increase the page number by one, it's conflicting with the primary key of the next record.
Any ideas? BTW, if the solution has to do with sorting, I need to make sure it's something that always defaults back to the correct sort, since users may be able to change the sort and accidentally save it. Plus, I'll need to do the same thing in reverse (delete a page).
DoCmd.RunSQL "UPDATE Pages " & _
"SET Pages.SchedulePage = [SchedulePage]+1 " & _
"WHERE (((Pages.ScheduleID)= " & varScheduleID & ") AND ((Pages.SchedulePage)>" & varSchedulePage & "));"
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Mar 8, 2007
My database tracks all of the staff development sessions provided for the past ten years, thus we have thousands of records. Our school district wants all departments to move away from using an employee's Social Security number to a number assigned by the district. Each employee has been assigned a unique six digit number.
In my staff development database, the employees data (Social Security number, campus, job description, etc.) are in a table, "EmployeesTbl", with the primary key being the Social Security Number. Classes data are in a table, "ClassesTbl" with some of the fields being ClassNum (an autonumber), class name, class description, etc., with the ClassNum being the primary key
in this table.
A third table, "AttendTbl", links the two and shows each class (staff development session) each employee has taken. This table has a a foreign key, "SocNum", that links it to the EmployeesTbl, and another foreign key, "ClassNum", that links it to the ClassesTbl.
I have added the EmpNum field to the EmployeesTbl, and all of the the district assigned employees' numbers have been entered. I have also added this field to the AttendTbl. Is there a means of using a query to fill in the employees number in this table. Is so, I'll then change the primary key in the EmployeesTbl to be the employee number and the foreign key in the AttendTbl to be the same. If not, we face the task of having to key in 18,000 records!
Thanks for any help,
R. Sanders
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Sep 18, 2006
Before you start yelling, use the search. I did.;)
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I'm using Microsoft Access 2007
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Guess I should add that I'm going to use a command button on a form to run the query and I want it to prompt me for the date.
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Aug 11, 2006
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Mar 25, 2007
I have a database that I imported as a comma deliminated csv file. To keep my original text comas intact I changed all the commas to semicolons before I created the csv file and imported the data. I now have a data base with semicolons in place of the original commas.
I am trying to use the update query function to change all the semicolons back to commas in one of the database fields called File_name
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