Split One Table Into 2 (relational) Ones
Feb 5, 2008
Hi there!
I'm currently working on a malformed Access database, not normalized at all.
It only consists of one table and is designed like this:
(table compartment)
#ID#Name#Member1#Member2#Member3#Member4#...#Membe r20#
So all the members are realized by single columns.
I created a new database, consisting of the main table, the "people" table and a relation table, connecting the people with the compartment (n:m relation).
It works great but I have to get the old data into the new tables. The old main table consists of more then 100 columns, and most of them are now hived off by using relations.
Now I'm looking for a smart solution to convert the table.
Do you have any idea? I tried to use a Query, but I couldn't merge two or more columns and put them in a single one on a new table.
Thank you in advance!
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Apr 15, 2005
Hi,
I have two tables, tblCountry and tblLocation. With the following structure
tblCountry
ID
Name
Text
tblLocation
ID
Country_fk
Name
Text
As you can guess tblCountry lists all of the countries, tblLocation lists all of the locations in each country, the tblLocation.Country_fk field is linked to tblCountry.ID.
I want the user to be able to edit [tblLocation].[Text] using a form. They simply select the country and then the location using combo-boxes and then add or edit the content using a textbox.
In my form I have a combo-box that displays the country names, the RowSource is set to
SELECT [tblCountry].[ID], [tblCountry].[Name], FROM tblCountry ORDER BY [Name];
I then have a second combo-box that lists the locations for the selected country. This uses an AfterUpdate() procedure to select [tblLocation].[ID] using an SQL query based on the value of the country combo-box. I.e:
SELECT [tblLocation].[ID],[tblLocation].[Name],[tblLocation].[Text] FROM tblLocation WHERE [Country_fk] = " & Me.country_box.Value & " Order By [Name]"
I want to be able to have a textbox that then displays [tblLocation].[Text] for the selected location. Thats where the problem arises. I can't find a way that will let me display any content thats available for the selected location AND let me edit it. I've tried using UpdateAfter procedures, different bindings (tables, queries based on the value of location combo-box).
Can anyone suggest how I can display [tblLocation].[Text] based on the value of the selected country/location and be able to update the information via a textbox?
Any help would be appreciated!!!
Thanks
Jon
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Feb 18, 2008
Hi folks, I'm new here - pretty hot at Excel but a total newbie at Access, So..
OK, I've got my database up and running. It keeps records of about 500 staff - everything is working fine but I now want to do stuff beyond my capabilities.. I've got a master record (Master Staff List) and a main input form (Data entry/amandment form). One of the input controls (via a sub-form) is for recording the time staff have spent working at a higher grade. Now if this was a one-off occurrence I could handle it but any one person could have multiple occasions that need recorded and I don't want to 'overwrite' the previous record. I have tried researching the problem and I think I need a 'one-to-many' relational table and a way to add a new period from the subform when required. The subform would also need to show blank when I opened it.
Any help would be appreciated.
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Jan 19, 2008
Hi guys, I'm fairly new to databases and am just creating sample ones at the moment and following tutorials from books. I tried to create my own cinema/movie database yesterday and there's something wrong.
I really wanted to work this one out for myself but after trying many different combinations of various relationships I just can't seem to get it working.
I have four tables..
A member table: MemberID
A booking table: MovieID, Screening Number, MemberID
A movie table: MovieID
A screening table: Screening Number
So the booking table is a composite key that links the member tbale (via the memberid), the movie table (via the movieID) and the screening table (via the screening number)
The problem occurs when I try to make a booking form for members to book a movie.
I use the form wizard and take the following fields:
The MemberID from the member table, the Screening Number and MovieID from the booking table. Then I add other relevent information from the Movie and screening table (for example, screening time, date, price etc from the screenig table and movie name, information from the the Movie table)
The MemberID is displayed on the main form with the other information in a sub form.
The problem I am having is when I enter a booking on the form, I get an error telling me the Microsoft Jet Engine cannot find the screening number in the screening table or something like that.
It lets me enter the other information but not with the screening number.
Thanks for any help.
Benn.
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Nov 10, 2014
In a situation where I imported an excel file with so many columns and split them into two temp tables and they are linked using a key.
the data has a fixed part lets say
Field1....Field2.....Filed3.....Field4...then Field5.....Field6.....Field7....Field8 is the same data range as Field9...Field10...Field11...Field12. I would want to split this data into multiple rows like this
Field 1 Field2 Field3 Field4 Field5 Field6 Field7 Field8
Field 1 Field2 Field3 Field4 Field9 field10 field11 field12 and so own...
What is the best approach?
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Feb 16, 2008
Hi
Not sure if anyone can help. Its been about 10years since I've built a relational access database, but offered to build one for someone, but am now a little stuck.
Its a photo sales tracking db.
I have 3 main tables. Photos, Sales & Customers.
The main form is a photo form with embedded subform showing the list of the sales related to the photo. This works well!
The second form is a customer form with embedded subform showing the list of purchases (sales form) related to that customer. This again works, but I cant get it to show the photo title of that sale in that subform. I think I am missing some sort of link.
I have relationships between photos and sales, and customer and sales. But it always shows a blank photo title field in the customer purchases list
This is a very brief outline and I can explain in more detail if some thinks they can help. So far the database looks good and mostly works but it is all a bit relevant if I cant get the customer purchases to automatically show the name of the photo sold.
Any help most appreciated!
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Mar 7, 2008
Hello everyone! I am completely new to MS ACCESS, so this problem might be fairly simple but yet it is eating my head.So if I get some directions it will be greatly helpful and appreciated.
Description:
The bakery buys ingredients from number of suppliers, makes a several kinds of cakes and sells to few shops. There are about seven ingredients in the first week with the possibility to add new in ingredients later on. There’s a catch though; on any day, only a single type of cake is made, in a single batch and all of them must be delivered before the next day’s cake are finished. It is necessary to be able to rack the ingredients used in a batch back to the suppliers.
I have made tables for suppliers, ingredients, orders and order line (with fields ordereId, ingredientId, quantity, unit price).
Forms that allowing users to allow new ingredients types, suppliers, and new order for ingredient are required which I have made. These forms are to be used to add the data for which ingredients are needed in the second week of baking.
So these are my questions on which I am stuck in
1. Do I need any more Forms or do I need to edit my form?
2. Is it okey to put table as the data source or would it be better to place a query?
3. How do I keep records of my earnings and expenditure, expenditure and keep them updated with my databases?
I hope you will understand that I am completely new to these topics and its really hard for me to grasp them all at once. Merely some guiding points will be of great help. Thank you.
6pandn21
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Mar 9, 2005
Im trying to figure out how to model 'Printer' and 'Cartridge' information. The relationship between them is Many to Many, but to add to my confusion, more than one cartridge can be used in a printer (Black + different colour cartridges). Adding a new entity to resolve the Many to Many does not solve this issue of how a printer can have, for example, a black cartridge and 3 different coloured cartridges.
Any ideas how to model this please?? I have been toiling with it for some time and I keep going round in circles :confused:
I'm sure it shouldn't be as difficult as it seems, so I'm hopeful someone might be able to set me straight :o
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Mar 15, 2005
Hi all, i have a relational database. In a form, Transactions, i have a text box, CustomerID, which relates to the primary key of the customers table. At the moment, if i enter a number that has no related record in the customers table, it will alert me only when i try to close the form or move to another record. I am wondering if it is possible to check for a related record immediately after the text box loses the focus.
thanks
joe
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Jan 22, 2008
The first time a person tries to use Microsoft Access, they are likely to miss the whole point of what a database is and how to use it. When they start having trouble making it work for them, they think in terms of what they may be doing wrong in their use of the obvious tools of Access. But often their problem is that they are unfamiliar with the principles that make databases so useful and they have started with a flawed database schema.
This tutorial is intended to explain the underlying principles of relational databases. It is, admittedly, rather theoretical and perhaps even boring. But without an understanding of these principles, a beginner cannot hope to use Access for any really useful purpose. If you are a beginner, I urge you to read through the entire tutorial.
There are several issues that arise time and time again, such as:
. Storing multiple values in a field.
. Storing calculated values in a table.
. Determining primary keys.
. Using Autonumbers.
. How many tables does this database need?
. Why don't my queries work?
Sometimes answers in the forum make it sound like these things are a matter of preference, or "which is the best?" But in most cases, they are not--there are well established rules that determine the one correct answer. It is only with an understanding of the principles of relational database theory that you can determine the answers.
So I hope you will find it worth your time to study this 7-page tutorial. If you think you've found something in it that's incorrect, incomplete or impossible to understand, please feel free to contact me. I have been known to make mistakes!
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May 14, 2007
Hi, I have a query with approximately 100 criteria. That is a bit much, thus I have made a table of the criteria and in the query a relation laid to this table. The criteria are countries with an increased risk on tbc. I point these query on a column with parent 1 and afterwards on the column with parent 2. Then I want the results from both query's in a table, but without double rows. I have tried this with a merge query but these only give the results where the hits for parent 1 and parent 2 are the same. This is by far not always the case, so, I miss all hits where there would be a hit for one parent only. Cumbersome tale, but perhaps there is someone who understands what I mean?
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Aug 11, 2005
Im creating a data access page overtop of a relational database. the database is simple... it has customers and workorders. there may be more than one workorder for a customer.
When I create a new customer record through my data access page, I want it to automaticly create a new workorder (filled with 0's)
Does anyone know how to do that?
Thanks
--Ben
PS: I understand SQL... I just need to know where to enter it (if necessary)
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Jul 17, 2007
Hope someone can help with this.
Basically we have an Access database with a main table, and several linked tables, joined on a unique ID.
For example :
tblFeatures :
FeatureID
FeatureName
etc
tblCategories
FeatureID
Category
So each feature can have many categories in a one-to-many relationship.
What I have a requirement to do is to pull that out as a flat file in Excel, ie
FeatureID, FeatureName, Category1, Category2
etc
What's the best way to go about this?
Cheers,
Iain
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Mar 22, 2005
Hi! I have a table named Employee Records, with a primary key "ERName". I use this to link to a table named Certification Records, with ERName as the link in both tables. My problem is this:
When I add a new record to Employee Records table, the name is not thrown in to a new record in Certification Records. This is a problem, because in my form that uses a query that includes both tables, when I add a certification record, it doesn't populate the name field in Employee Records table. I don't know where I went wrong, but I feel stupid because this is so basic and I should have caught it earlier... any ideas, please? Thanks!
KellyJo
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Aug 23, 2013
I have a simple relational database with the proper linking tables, etc. I am normalized through BCNF. I have a table that will track tasking details, however, more than one person is assigned the tasking. How do i add to my form the ability to add additional people to the tasking?
If I drag and drop the name field then it is a one name for one box deal. I want to create a combo box that uses a query to prepoulate multiple elgible names (already built) and then you can select the person you want. Afterwards I want the task assigner to dynamically add additional people to the task with no true limit as the group can be as small as one and as large as thirty.
I attached a small screenshot of the basic table structure. I need to be able to add multiple SME's to the one tasking...
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Jan 17, 2013
I'm attempting to set up a relational database utilizing a composite key of several data fields. I had no problem doing this with FileMaker Pro yet with Access 2003 I'm having problems. For example, in Design View I select the field names needed for the composite key.
Yet when I click save I get a message "Microsoft Access can't save property changes for linked tables." As a result I'm not able to construct a composite key of the several data fields selected.
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Dec 10, 2007
I have one table - 40 fields, 40000 records. Iwant split this one table up to 4 different tables (keep data). Is there an easy way, pls?
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May 25, 2015
I have a table which contain around 10 Lacs records, now i want to split the same in to 10 or more table with 1 lac records.
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Feb 6, 2013
I'm gonna get right into it; here are two tables I have in my database.
tblAccession
-Accession (PK)
-State
-Test Type
tblSamples
-Accession (FK)
-Sample
-Additional
-Cassette
-Tissue Type
-Comments
-Trim initials
-Trim date
-Section initials
-Section Date
-Control (FK from a third table)
For tblSamples, the fields:Accession, Sample, Additional, Cassette is the same for each accession and is entered when an Accession is logged in at the beginning of the process. The rest of the information (Tissue Type, Comments, etc.) is entered when various people completes those steps throughout the testing (fluctuating people and days). Should I have have the fluctuating information (tissue type, comments, etc.) as a separate table? With a one-to-one relationship? Would there be an advantage/disadvantage to splitting tblSamples into two different tables?
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Oct 20, 2005
I am using a Table to store Parameter Values for a Split Multiuser DB. Question I have...Can I have this Table on the Front End while all the others are on th back end? The use for the table is to store parameter values for multiple queries without the user having to reenter the parameters.
I've tested this and it seems to work...but would like to know if there may be complications.
FYI. I am a Novice VBA user.
Thanks,
Felix
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Mar 9, 2006
Hi all
I was hoping to get a little advice as to my problem. I have a database with many, many reports, forms and queries. I wanted to split the database to secure the tables and important data. So I use the database splitter wizard and ever thing went just fine. So now my database1 looks into database1_be for all tables.
My problem is: my program now runs very slow. The slowest seems to be when I am adding a new record. I can live with the slowness of retrieving an existing record. I do not have a server nor can I afford one at this time, so currently I am running a peer-to-peer network with the database1_be located on one of my computers second hard drive.
Is there something I can do to help speed things up?
Thanks Enviva
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Aug 18, 2014
So I split my database into a front and back end, now i wanted to add a table to the database. I created the table in the backend but I am not sure how to make it appear in the front end. I am using access 2010. I tried the link table manager but the table I created doesn't appear there.
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Apr 8, 2015
I'm working on recreating my church's records in access and was originally wanting to take people from the Visitors table and automatically move the to the Members Table (and same with Deceased & Moved), but after some searching found that's not really do able. So now my question is, can I have a master table that has everybody (visitors/members/deceased/moved) and then split that into different tables while keeping the main table (that way I can go into the main table and reassign the person)?
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Aug 18, 2014
So i split my database into a front and back end, now i wanted to add a table to the database. I created the table in the backend but im not sure how to make it appear in the front end. Im using access 2010. I tried the link table manager but the table i created dosent appear there.
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Aug 7, 2013
I've been able to make a normalized relational database with cascading combo boxes, etc.
How to validate a field? The format needs to be according to the following:
<0 AND <=9999 [Optional: followed by a capital letter]
Examples of Valid Data:
7
4A
354
8756G
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Nov 21, 2013
I have an Access 2007 file that is 'split' so the tables are centrally stored on the server.
How do I update one the linked tables stored in the back-end file with a table from another Access file?
If I import the 'new' table it is not 'linked' - it is embedded with the Access file I am working on.
What is the correct way of doing this without corrupting the data?
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