Tables :: Splitting One Table Into 3 Related Tables
Jul 16, 2014
I'm trying to split a table up because I now realize it won't be able to do what I need in the future. It wasn't designed properly at the outset, and I'm trying to correct it now.
This is a database of pregnancies and deliveries.
The single table does not cater well for multiple pregnancies (twins, triplets, etc), and also I foresee problems when mothers come back in future for another delivery.
Therefore I am trying to separate data into 3 tables: Mother, Delivery and Baby.
This is because each mother can deliver more than once, and each delivery can have more than one baby.
I have set up a trial database, with just a few fields in each table to see if this works. An screenshot of the table relationships is attached.
The primary key of the Mother table is linked to the Delivery table, and ditto the primary key of the Delivery table and the Baby table.
I'm not sure how to migrate the data over, in terms of the primary keys of each table, because in the new tables, these should be an AutoNumber field, so that they are unique numbers.
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Jul 4, 2013
I have a database composed of personal statistics. (name, age, height, wt, etc). I have two attachment fields. Photos and Videos. Each of these fields can contain more that one file. The size of the video attachments is starting to get me up close to the 2 GB database limit. If each attachment field contained only one file, I would convert the fields over to a path link. I'm stumped on how to move the files out of the main database to control the size, but maintain the multi-file link to my forms. How to restructure this?
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May 28, 2013
I am splitting a database and have created the Back end already. When I create the front end and link to the tables on the back end... The front end does not link to all the tables in the back end. The list that comes up when creating the linkings does not show all the tables in the back end. What would cause this?
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Oct 5, 2012
I want to split a table into multiple sets based on rowcount. Suppose I have a table having 10,000 records. I want different sets which should have values based on rowcount. Suppose if I select set 1 then the table should populate records from 1-2500. If I select set 2 then the table should automatically give the records from 2501-5000. If i select set3 then the table should have values from 5001-7500 and so on.
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Dec 3, 2012
I'm not sure why a couple tables are not being updated after entering data. I think my relationships are correct. I've attached the database.
steps:
open Main form
add addres then try to add an owner. it doesn't work the first time but it does work the second time. add test data and that works. now if you look at the related tables (OwnerInfo, WellLocation, TestData) they all have p_id which is the wellLocation Id
now open gernalinfo form
enter in info (tests requested doesn't work right now but you can click on them in the tbl GeneralInfo)
Now if you go to the table OwnerInfo and TestData the key p_id has not been updated. But it's there in WellLocation (ID).
Why are these tables not getting updated?
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Jan 14, 2013
I have created a table that acts as a header for my data and a second table that acts as line item data. What I need to do now is add a second child table that uses the line item data as its parent table and stores associated line items for each record. Is this possible?
This is a skeleton view of what I'm going for:
Master Table:
tlbAuditReportHeader
- AuditDate
- AuditArea
- Auditor
Sub Table:
tblDiscrepancy
- Discrepancy
- CorrectiveAction
- ActualCompletionDate
- VerifiedDate
- Notes
Sub table to Sub Table
tblFollowUp
- FollowUpDate
- AssignedTo
- SpokeWith
- EstimatedCompletionDate
- Notes
Sometimes tasks change hands or are pushed back depending on work load. It would be nice to be able to track something like this.
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Dec 8, 2013
I explain , I have 5 tables :
Class ( classID , classname,... )
Student (studid , firstname, lastname , classID ,....)
Course( courseid , coursename )
Term ( termid , termname , begindate , enddate )
Score ( scoreid , studid , courseid , termid , score)
Note :
1) A class can contain one or more students (one-to-many between Class and Student tables)
The table "Score" is a junction table between three tables : Student , Course and Term because it contains three foreign keys ( I could use a combination of 3 foreign keys to make a primary key ! ) .
The tables ; "Class", "Student", " Course ", "Term " already contain data for each table I created a data entry form .
My biggest problem is how to create a form to enter students' grades or scores for each student that belong to his class.
I do not know how to do it especially since the idea is that :
On a form I would like to use ComboBox to select a class that displays student's list from class selected and a ComboBox in same form to select course and another ComboBox to select a term and then enter grades or scores for each student
This is my general idea to enter students' grades. The rules are :
A class contains one or more students
Each student takes one or more subjects.
Each student gets scores for each subject and each term(quarter)
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May 13, 2013
I am a beginner in access and I want to populate a new field (REPUN_1 which corresponds to SEGMT_ID in the other table) in my table and this field is coming from another table. The values of the fields need to correspond to the row of my actual table (JMTable) having the same CO_ID, MOVEPLANCD and TTY_NO as the table I want to extract the values from (DI_Treaty_Crosswalk).
Here is my query:
UPDATE JMTable SET [REPUN_1] = DI_Treaty_Crosswalk.SEGMT_ID WHERE JMTable.TTY_NO = DI_Treaty_Crosswalk.TTY_NO AND JMTable.CO_ID = DI_Treaty_Crosswalk.CO_ID AND JMTable.MOVEPLANCD = DI_Treaty_Crosswalk.MOVE_PLAN_CD
and it doesn't work since access ask me to enter a parameter value.
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Apr 3, 2007
I have a form displaying the 11 fields of the parent/primary table using a selection from a combo box. I am using queries and vba code modules respective to form, combo box and command buttons. I have initial code that uses the two fields from the combo box selection to append same to a new parent/primary archive table. I now want to add to the append SQL the remaining fields to the parent/primary archive table. When I add the second sql string for the remaining fields to the same procedure and execute I keep getting 'null in primary key'. If I copy the primary record and paste same into the archive table it works.
Private Sub Command26_Click()
On Error GoTo Err_Archive_Primary_Click
Dim strSQL As String
Dim strSQL2 As String
strSQL = "INSERT INTO ARC_289325045 ([Survey Point ID], [Survey Area Detail], [Date On Site]) " & _
"VALUES ('" & Me.cboAreaDetailDate.Column(0) & "','" & Me.cboAreaDetailDate.Column(1) & "'," & _
"#" & Me.cboAreaDetailDate.Column(2) & "#)"
CurrentDb.Execute strSQL, dbFailOnError
'strSQL2 = "INSERT INTO ARC_289325045 (RecordID, UnitID, UserName, [TimeStamp], [Survey Point - Area], Measurement, NewArea, [EXIT Form] ) " & _
'"SELECT FORM_ID_289325045.RecordID, FORM_ID_289325045.UnitID, FORM_ID_289325045.UserName, FORM_ID_289325045.TimeStamp, FORM_ID_289325045.[Survey Point - Area], FORM_ID_289325045.Measurement, FORM_ID_289325045.NewArea, FORM_ID_289325045.[EXIT Form] " & _
'"FROM FORM_ID_289325045"
'CurrentDb.Execute strSQL2, dbFailOnError
Exit_Archive_Primary_Click:
Exit Sub
Err_Archive_Primary_Click:
MsgBox Err.Description
Resume Exit_Archive_Primary_Click
End Sub
The next step is to do the same for the child table and append related records to the child archive table.
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Apr 3, 2007
I have a form displaying the 11 fields of the parent/primary table using a selection from a combo box. I am using queries and vba code modules respective to form, combo box and command buttons. I have initial code that uses the two fields from the combo box selection to append same to a new parent/primary archive table. I now want to add to the append SQL the remaining fields to the parent/primary archive table. When I add the second sql string for the remaining fields to the same procedure and execute I keep getting 'null in primary key'. If I copy the primary record and paste same into the archive table it works.
Private Sub Command26_Click()
On Error GoTo Err_Archive_Primary_Click
Dim strSQL As String
Dim strSQL2 As String
strSQL = "INSERT INTO ARC_289325045 ([Survey Point ID], [Survey Area Detail], [Date On Site]) " & _
"VALUES ('" & Me.cboAreaDetailDate.Column(0) & "','" & Me.cboAreaDetailDate.Column(1) & "'," & _
"#" & Me.cboAreaDetailDate.Column(2) & "#)"
CurrentDb.Execute strSQL, dbFailOnError
'strSQL2 = "INSERT INTO ARC_289325045 (RecordID, UnitID, UserName, [TimeStamp], [Survey Point - Area], Measurement, NewArea, [EXIT Form] ) " & _
'"SELECT FORM_ID_289325045.RecordID, FORM_ID_289325045.UnitID, FORM_ID_289325045.UserName, FORM_ID_289325045.TimeStamp, FORM_ID_289325045.[Survey Point - Area], FORM_ID_289325045.Measurement, FORM_ID_289325045.NewArea, FORM_ID_289325045.[EXIT Form] " & _
'"FROM FORM_ID_289325045"
'CurrentDb.Execute strSQL2, dbFailOnError
Exit_Archive_Primary_Click:
Exit Sub
Err_Archive_Primary_Click:
MsgBox Err.Description
Resume Exit_Archive_Primary_Click
End Sub
The next step is to do the same for the child table and append related records to the child archive table.
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Oct 22, 2014
I have to make a Costing System but for that I need to enter our Expense details in database according to Fiscal year and months.
I need a table for Fixed expenses and one for Variable Expenses and then I need one or more Forms to update data in those tables. Now I've created a table with Fixed Expenses. I have to update Year and Amount in that. Now it is only letting me one entry per Expense.
I want multiple entries for one Expense say 'Advertising' for different years. I'm thinking may be I need to make more than one Table, may be one for Expenses with ExpenseID and other for Years with Year and YearID and the third one for Amount with columns Amount, Method of Payment, Date and Notes. I did tried this but I think I'm not creating proper relation may be because its only updating for one year.
I'm using Access 2003.
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Aug 27, 2013
I am having an issue where a small percentage of my records do not follow my related Tables.
ex: 3 tables
tblEmployee
-intEmployeeID
-intWorkCenterID
tblWorkcenter
-intWorkCenterID
tblManager
-intManagerID
-intEmployeeID
-intWorkCenterID
where:
tblemployee.intworkcenterID -- tblworkcenter.intWorkcenterID -- tblManager.intWorkCenterID
Basically I have my general employee information in the tblemployee table, the workcenter information in the tblworkcenter, and the manager of the Workcenter in the tblManager. This is correct for 99% of the employee population. however, there are a few employees whose manager isn't the 'general' manager for the employees assigned workcenter.
How I can adjust an individual employees manager, while maintaining my structure? or would i have to go back and add the managers ID to a field in the tblEmployee Table?
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Sep 27, 2012
I have a built a database to record and collate info about clinical trials that are run within my department. I have one large table [Trial Info] which contains all trial info and have created a second and third table [Milestones] & [Comments] to collect dates of various milestones and a notes that occur throughout the course of a study.
The milestones (dates) are recorded in the 2nd table and the comments are recorded in the 3rd table.
All data is entered by staff on forms. The first form captures basic info about the study, once this has been entered, the idea is to click a button to open the second form to document the trial milestones, this form also contains a subform for listing any free text comments required during the life of the study which are stored in the 3rd table.
I have setup the relationships between tables as best I can.
The main table with basic trial info is the parent table, linking the primary key to the foreign key in the second table, the foreign key of the third table is related to the primary key in the second table so these tables should be looking up the correct clinical trial as far as I can tell.
The form containing data from the main table has a button which I have set to open the Milestones & Comments form, and I have set this to open to the record that relates to the record in view in the primary form. The primary key is related to the foreign look-up key in the milestones table.
This opens the form fine, however this is not updating the foreign look-up key, this remains '0' which I assume is the cause of the following error when I try to save changes to the record
Quote:
You cannot add or change a record because a related record is require in table 'Trial Info'
How do I trigger the foreign key to update to the primary key so that the first time a milestone page is opened for a new study it creates a matching record?
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Oct 16, 2012
Three tables:
Employee, Sessions, EmployeeSessions.
Many sessions can have many employees - thus the joining table has been included.
When trying to delete an employee from the database using a form, I encounter the error:
The record cannot be deleted or changed because table 'tblEmployeeSessions' includes related records
Is there a problem with my table relationship structure? Or is it 'correct' that as the employee is supervising a session he/she cannot be deleted as this would interfere and maybe mess up the session record?
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Aug 7, 2014
I'm trying to create a system where if I enter data into one field it will automatically appear in the corresponding field in another table. For instance if I enter the values 10,12,15 into a field called QID in table A I would like this to appear automatically in a field called QID in table B. Both tables are related and I have enforced referential integrity and 'cascade' options but this still doesn't seem to allow one table to automatically update another. My ultimate aim would be to have a form that you filled in data for the field QID once that then propagated to both Table A and Table B.
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Jan 14, 2008
okay, last question. I promise. You all have been so helpful, though...
I have been given the assignment of splitting down a table into two more tables(three in total). My question is this: Could I use the Table analyzer? If so, what are the shortcomings? I would like to have the other tables referenced by the key of the original table instead of a lookup field, whioch I'm not sure if I can do in the analyzer. What attracts me to the analyzer is that it would make the needed queries to join the new tables. If I don't use the analyzer, would I use a make table query to accomplish it? If so, would I have to change every existing query in the database that used that old table?
I know it's a lot, but any help in pointing me in the right direction would be much appreciated
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Aug 6, 2013
So I have a form, it has a few fields from a related table in it, related by the name. I click 'new' on the form, but when I click save Access complains about the related table does not have a matching record. How do I have it create a new record?
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Nov 14, 2007
right i've been trying to think how to do this and i can't work it out... really shouldn't have got myself into the situation in the first place but i'm hoping its easier than i think so here goes
i have two tables TBL_Batches and TBL_Jobs, there are batches of jobs, many jobs to one batch so the tables are linked in a one to many relationship
there is a field in TBL_Jobs called job type which can be typeA or typeB and all the batches contain a mix of typeA and typeB jobs
the end result which i need to achieve is to have two entries in TBL_Batches for every one i have at the moment, one of them containing only typeA and the other only typeB... so where i have batch1 i should have batch1a and batch1b remove batch1 and all the foreign keys in TBL_Jobs changed so they link to the appropriate new batch in TBL_Batches
any ideas?
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Mar 3, 2015
I've developing a little Project and have some issues after splitting a db.
I have some forms in wich I want to see some tables with the "+" sign on the rows so I can go to their linked tables. The problem that I have is that everything works perfect until I split the access file.
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Jun 29, 2015
I am trying to split a field that contains a digit, so lets say the field contains the digit 7, I need it split into 7 fields. How I can do this?
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Oct 22, 2012
Currently I keep getting this error: "You cannot add or change a record because a related record is required in table"..My current tables are this:
Primary Table with persons info:
Primary Key - Auto number generated
Name
Address
Email
Phone
I have 4 other tables with use check boxes.
ex:
Table 1 - Geographic locations visited
ID - Auto generated
USA
CANADA
ASIA
ECT...
Table 2 - Languages Spoken
ID - Auto generated
Spanish
Chinese
English
Table 3 - Skills
ID - Auto generated
Hunting
Dance
Singing
Weaving
Is this not a genuine one-to-one relationship table? I mean No two people would have had visited the same places and speak the same language no? I tried to create a one to one relationship with the primary key to the auto generated ID of the child tables but I'm sure that is not how you do it. Also when I try to save the check boxes in my form and I close it and come back it doesnt save and is blank again. Is it because my form gets its information from a query that takes all the information from all the tables.
how I can get this to work properly? Am i to make use of a foreign key? I've read a lot about it online and watched youtube videos but I dont see why I need it here in this case. Is there a way to set the IDs in the child tables to be the ones from the primary table? Or do I have to use a foreign key and manually input the primary ID into them?
Or would it be better to have all these child tables in the primary table and have one large table instead? I just didnt do that because one of them has like 20 checkboxes with cities and locations
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May 15, 2006
Hi everyone!
My names james, im 18 and im a data manager for a school.
My schools database stores student data such as names, classes and exam grades. I have a table containing each students personal details such as name and address. Each pupil is assigned a unique PupilID which is the primary key. I then have a number of other tables linked to it with one to many relationships. Each of these tables holds a different set of exam results. The tables are linked through PupilID. The primary keys for the other tables are auto numbers.
The problem is this: when i add a new student to the Students table i cannot get their PupilID to automatically be entered into the other tables containing grades as part of a new field. How can i make this happen?
Thanks.
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Jan 22, 2007
Ok due to user error (and my own fault for not archiving an old database) we now have two databases which have had data entered into with the same table structure.
The table structure we have at the moment is with the related field in []:
Propertytbl[Propertycode] is related to Systemtbl[sysID] which is related to Assessmenttbl.
There is also another Temperaturetbl linked to Systemtbl by [sysID]
The problem i have is sysID is an autonumber. I can't simply paste in the difference in data as the assessmenttbl records and Temperaturetbl records will point to a different system (as the sysID will change in the Systemtbl data)
Can anyone think how i can do this either through using queries or programmatically so that i don't have to enter 5000 records manually.
I've tried using append queries but this produces the same affect as above.
Many thanks
Matt Collins
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Apr 2, 2007
I have a combo box in my main form that gets its list of physician names from tblPhysician. When the physician is chosen and the record saved, it saves the PhysicianID to my main table, tblOncReg.
When I delete a physician, any record that had that name chosen continues to have that name in the record despite it being deleted from tblPhysician.
I thought that setting relationships would solve it, but when I select "Enforce Referential Integrity" and "Cascade Update Related Fields", I get an error saying "Invalid field definition 'ID' in definition of index or relationship.", and it doesn't set the relationship.
Would setting the relationship solve that problem?
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Sep 2, 2007
In a case where two tables are related, can the field names which relate them be the same? Or is it necessary to use different field names?
Robert
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Jan 26, 2006
whats the best way of appending tbl_orders and the related data in tbl_order details to the two identical archive tables when the "COMPLETE" column is "YES" in tbl_orders
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