Storing Calculated Fields In A Table
Apr 20, 2007
I know that it is bad form to store a calculated field in a table - normalization and all that - but I can see no other way around a need that I have.
I'm trying to make a database to store injury time for employees. If an employee is injured, he can do light work for a certain amount of time, but this light work need not be contiguous. But, the total time on light work must be known so as to see when it is used up.
For example:
Bob is injured on 4/1/06 and goes on light work on 4/2/06 until 4/5/06 (4 days). Bob is then taken off light work until 4/10/06 when he reinjures the same injury. This does not count as a new injury, because it is an aggravation of the old one. So, Bob goes back on light work on 4/10/06 until 4/15/06 (6 days).
So, I need to store Bob's total time on light work for this injury (10 days) so that I can keep a running total to check against the maximum for a single injury. All I can think of is to store the sum of days on light work as a field in Bob's injury record, but that means storing a calculated field in a table.
Am I missing an easy way to do this, or is there a method to do what I want that I am just not aware of?
Thanx for any help!
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Jul 26, 2012
I know that it isn't usually best practise to store calculated fields in a table, but in my situation it is necessary, and I haven't really found a good answer for this after searching these and other forums.
Currently my database has one "Name" field (I didn't make it like this) which might look like this "Jonathan (John) Smith"
Now I also have reason to grab the name like this "Smith, John" for other purposes.
I've set up a form for inputting new people with separate fields for firstname, preferredname, and lastname. I have the calculated fields:
=[fname] & " (" & [pname] & ") " & [lname]
=[lname] & ", " & [pname]
(Later I will add in all the iif's for if there is no preferred name)
Upon finishing the form, the user hits Submit, and I would like to store the concatenated values into the table in their appropriate fields.
I can do this with a SQL INSERT INTO statement but I'd have to add all 25 or so fields from the form, and injecting user input directly into a SQL statement is not best practice either.
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Aug 9, 2005
New to Access and learning the hard way. Im sure this is an easy one, but sure would appreciate the help. I am trying to sum a group of cells and display the total, which i have done. But I also want to store this total in my database. So my question is, how do i move my calculated total to my field that has the "record source" bound back to my field in the database? Hope that makes sense. Thanks in advance.
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Aug 26, 2005
Hello All,
Probably trying to do the impossible.
Normally I would never (that’s a long time) have the results of a calculated field in a table, but I’m stumped.
Table1
TestID: Autonumber
Quantity: Number
Selected: Yes/No
Table2
SumID: Autonumber
TestID: Number, Foreign Key
Quantity Delivered: Number
Query1-Sum Query
Table2
TestID: Group
Quantity Delivered: Sum
Query2- Select Query
Record Sets
Query1 Table1
TestID-----------------------------------TestID
Quantity Deliverd Quantity
Select
Fields in Query2
TestID from Table1
Select from Table 1
Run Query
Can’t update “Select” field
So I’m thinking that I should create a 3rd query to update the summed Quantity Delivered into a new field in table 1. Which would in effect create a stored calculated field.
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Sep 16, 2013
I have a score marking template for an internal audit. A criteria is either met, or it is not. All of these questions have Yes/No data type. each question has a weighting. I have written a VBA function to work out the total score by using a bunch of If statements.I need to store the final result in a table, by entering the answers (yes or no) into a form.
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Aug 15, 2004
Here is an example of what I was talking about re: private message and storing calculated fields. Any help is much appreciated.
Also I received your email in regards to a sample secure database but I am getting a "Memory could not be read" error when I try to open it. Does this have anything to do with how it has been converted to 97 format or is it an error at my end? (I've been able to open other dbases from the forum).
Thanks,
Dearnne
PS Thanks also for your help with adding to option groups.
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Aug 10, 2007
Hi,
I know it breaks all the rules to store a calculated field on a table, but I've painted myself into a corner with the way I built this particular database, not good, I have repeating groups and basically the whole database is built this way. I need one form to store a calculated value on a table to solve a problem on a report that encapsulates the total of all the repeating groups. Before you start the lecture, I know I messed up, but this is way to far down the road to start over. Any help would be greatly appreciated.
Gary
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Jan 8, 2014
I know that as a general rule one should not store calculated values in a table, but if I need to include such a value on a number of forms, and calculating that value involves manipulating an ADO Recordset, does there come a point where the performance hit outweighs the design "quality"?
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Nov 5, 2013
I want to be able to store 2 identical fields on the same table in the database. The copy will start off being the same as that input in the original field. 90% of the time the 2 fields will always be identical but the copy may be changed at a later stage. I looked into using the copy as a calculated field but found out these can not be updated. Is there another control I can use or do I have to code the population of the 2nd field specifically (in AFTER UPDATE EVENT?) myself. The added complication is that the original and copy must be selected from a combo box as all values are held in a separate table.
Also trying to make the second field = to the first field in the design stage of the table using default value
SO if I put default value = [table].[fieldname] I get an error stating could not find field 'table].[fieldname', and yes the opening and closing square brackets are missing from the error.
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Jan 3, 2006
if i have formula in a text box can that calculation be stored in a table???
example
sales total
sales tax
grand total
where grand total = sales tax+sales total
if the control is bounded to a field in a table once the formula is entered doesnt it loose the connection with the field???
right now when i enter a formula in a control it will no longer store it in the table but it will only show the result in the actual form..???
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Nov 5, 2004
Hi all, another beginner question here.
I have a table of records which is is basically temp storage, once I'm done inputing information, an append SQL statement is run to move the data to its permament table, then I use a delete statement to remove the values in the temp table.
Now, I have a column called Result, which stores the values of a radio button group (1, 2, or 3). I have a series of queries which count the number of times 1 or 2 appear (3 in this case, doesn't matter since it represents N/A. 1 = True, 2 = False, 0 = Null).
I'm having trouble getting the result of said query to store in a table. The statement is as follows:
SELECT [qryGetFail]![CountFail]+[qryGetPass]![CountPass] AS Total
FROM qryGetFail, qryGetPass;
This returns the sum of both counts, so I know how many questions were answered either Pass or Fail, hence I know how to score record. Here is my Append SQL statement as it currently works:
INSERT INTO tblAuditResults ( Question, Result, Comment, ACAPS, AuditDate, TeamMember, Auditor )
SELECT tblQuestions.Question, tblQuestions.Result, tblQuestions.Comment, [Forms]![frmAuditCreate]![txtACAPS] AS Expr1, [Forms]![frmAuditCreate]![txtAuditDate] AS Expr2, [Forms]![frmAuditCreate]![cmbTeamMember] AS Expr3, [Forms]![frmAuditCreate]![txtAuditor] AS Expr4
FROM tblQuestions
WHERE (((tblQuestions.Product)="4" Or (tblQuestions.Product)=[Forms]![frmAuditSelect]![txtVarProduct]) AND ((tblQuestions.Function)="3" Or (tblQuestions.Function)=[Forms]![frmAuditSelect]![txtVarFunction]));
This stores everything I need it to. But I cannot for the life of me get the statement to accept a value from a qeury and store it. I have tried adding another expression but it always just prompts for the value instead of pulling the value from the qryGetCalc.
Is there a specific way to have an INSERT statement pull a value off an active query?
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Mar 7, 2014
I understand the conventional wisdom of not storing calculated values on the table, but I have a need to do do so. On my Input Screen I have a generated Certificate # derived from 5 single value fields keyed onto the screen. This certificate # is unique to those 5 single-value fields which should not be repeated. I want to store it on my Table as the Primary key with "no duplicates" so that if a keyer keys the same 5 single-digit values , thus creating the same Certificate #, he will get a MsgBox back telling him he cannot add a duplicate entry.
attached is my table and Input Screen.
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Jul 5, 2015
Eventhough i know calculated control are for queries, I still need to store a calculated value of a sum. I have a form with customers, dates, locations. That form has a subform that contains the services done and materials used. This subform is in datasheet view. In the footer i have a control with =Sum([Price]).
So I need the value of this control to be stored in the table the main form is based on. I did an unbound control in the main form where the =Me!Subform.Form!.Textx will bring the value "over" Then for the on focus event the vba code Me.Total=Me.Textx stores the value. That is fine. The same works with a command button with the same vba code.
However i am asking if there is a more automatic way to get the value over without the unbound control/command button.
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Aug 5, 2013
I am trying to create an accounting program on access and i got stuck on the final touches
I'll explain my situation in brief. I created two tables
/1 for the invoices (invoice number, client name, total)
/1 for the orders (order id, invoice number, subtotal)
And I made a relationship between those two and everything worked out well. I created a form/subform and put a text box in the subform to calculate the sum which worked correctly. And I exported the value of the sum to the main form and it's great.
The problem is that how can i make the Total field that belongs to the table invoice have a default value as same as the Expression (sum) so that the sum is stored with the invoice record.
i attached the picture in the attachments
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Mar 6, 2006
I have 3 values in unbound text boxes and a 4th text box that is calculating the sum of the first three text boxes, i need the result of the calculation to be stored in the field "Total Cost" that is also on this form.
Any ideas
Cheers Mikk
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Sep 14, 2006
I have a small Database that produces invoices, Each invoice could have 5 items on it which are compeleted at different Dates. (cutting hair in an OAP Home) Invoice to be produced at the end of each month which shows what happened each week. This will be generated for each person in the home. I can display all the information in a form when inputing the invoice information. I want a button to copy the invoice number the client name and the total of the invoice to a new table. The total of the invoice is calculated control on the form.
How do I do this??? can anyone help
I need a total in a table to substract payments from.
All Help will be much appreciated.
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Apr 26, 2007
Hi all,
I need to figure out how to have two calculated fields written to the database table instead of just being displayed in the form.
The user selects a number from 1 to 5 in the first field, and a number from 1 to 7 in the second field. The first calculating field multiplies these two numbers and displays the result. The second calculating field determines where the resulting number fits in three ranges of numbers and displays the result as Low, Medium, Or High.
My problem is the calculated results are be displayed in the form but not being written to the table. I cannot create a report to display all the High results, etc.
How do I update the calculation field formula to write the results into the table so I can create queries/reports on the calculated data?
Thanks,
bugleboy62
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Sep 27, 2012
I have three columns where A is a number, B is a number and I want to make C = to the greater of the two. i.e.
Col A = 10, Col B = 12 therefore Column C = Col B or Col A = 12, Col B = 10 therefore Col C = Col A
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Nov 29, 2005
I have a form created from a table and I had to use calculations in some of the fields to automate certain processes. Now, if I pull a report based on the fields in the table - I am getting all except for the fields with the calculations. Is there any way to update the main table - since most of the calculations were done with text boxes?
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Aug 28, 2006
I need to display a value from a table in a text field on a form based on another text field on the same form.
The table has records as follows:
Month/Year xx Month No xx Year No xx Month ID (xx shows break in columns)
Jan-06 xx 1 xx 2006 xx 24
Feb-06 xx 2 xx 2006 xx 25
Mar-06 xx 3 xx 2006 xx 26
Apr-06 xx 4 xx 2006 xx 27
May-06 xx 5 xx 2006 xx 28
Jun-06 xx 6 xx 2006 xx 29
Jul-06 xx 7 xx 2006 xx 30
In one text field I use the DateSerial function to calculate the value of the previous month (e.g.Jul-06). I need to return the MonthID value to the second text field based on the value stored against it is the table, so in case of Jul-06 it would show 30 in text field 2.
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Aug 5, 2006
Is there a way to make some of the fields from my form that contain calculated values carry to the table? Right now the values calculate correctly in the form but when I look at the table the field is blank...
I was hoping to use one form to calculate a value, insert it in the table, and then use that value in another form.
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Aug 8, 2014
I am great with Excel but not soo much with Access 2010. I Excel, what I needed to do was very simple but duplicating what I did in Access is not soo easy.I am trying to calculate billings for FSA & HRA. I have set up one table with all the data. I want to add columns to the table to calculate:
1. Is there an account balance-excel formula:
2. If the account is still active
3. If the plan year run out is "active runout" or "runout over"
4. calculate each account type with a rate *count of FSA accounts = total to bill
Here are my excel formulas that for the life of me I can't get to work.
Account balance==IF(V2="HCRA",(IF(AB2-AD2>0,"Available Balance",IF(AB2-AD2=0,"Zero Balance","Negative Balance"))),((IF(AC2-AD2>0,"Available Balance",IF(AC2-AD2=0,"Zero Balance","Negative Balance")))))
Active runout/runout over=
=IF(AG2="YES","Active Runout",(IF(S2=W2,(IF(AF2>$AJ$1,(IF(AH2="Zero Balance","Runout Over","Active Runout")),"Runout Over")),(IF(AE2>$AJ$1,(IF(AH2="Zero Balance","Runout Over","Active Runout")),"Runout Over")))))
Active account=
=IF(D2<$AJ$1,"NO",IF(W2>$AJ$1,IF(S2=W2,"YES","NO") ,"NO"))
Can I have calculated fields that refer back to a calculated field?
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Oct 16, 2014
How to store a calculated field into a table
I am preparing an invoice and I have a field called deposit .Now this field calculates %40 of the total of the order .but if the user wishes they can enter what they like .Now this field must be stored in a table for ever and a day and must not change or the invoice will be useless .I can see no other way of doing this and my research tells me (allen Brown) that this is sometimes necessary .
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Mar 6, 2006
:rolleyes:
Please help! I am a newbie and VERY confused. I am not a programmer but am just learning so any help much appreciated! I'm not even sure if I've posted this to the right place?
I have so far created a table and also an asscoiated form - they both work! Changes in the form go into the table, no problem EXCEPT where I have a calculated field in the form - this info doesnt go into the table - how do I get this information to go back into the table?
I am trying to do this because I want to include the result of the calculated fields in a mail merge letter in Word (and Word wont pick up fields from my associated form - only from the table or from a query!)
Please rescue a damsel in definite distress (I've been knocking my head against a brick wall on this for 3 hours now!)
Many thanks in advance :D
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Oct 7, 2005
Hey there,
I want to store a "calculated" value from a form text-box. By calculated, i simply mean that it is a textbox that contains the following Data:
=[MemberFirstName] & [MemberLastName]
Basically, the field is the Members Username, the text box is called "Username" and it needs to be stored in "tblMemberInfo" under "MemberLogin" so that it can be used externally for the website.
The value is only going to be calculated automatically by the form once, and then it wont need to be changed again, which is why i want to store it in the db.
Any ideas on how i'd go about doing this?
Cheers
Fatmcgav
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Mar 19, 2005
I need to know if I can store data in more than one field, without allowing Duplicate entries.
Example: We have to send out letters with a claim number on it, sometimes we need multiple claim numbers on a letter, up to about 10 claim #'s is the most I've seen thus far.
We mail merge into Word to create the letters.
However, these claim numbers cannot be duplicated within the database and in order for this to work with the mail merge, I need several fields to store the claim numbers.
Fields are:
ClaimNumber
ClaimNumber2
ClaimNumber3
etc....
To be more specific. I probably have a bad data structure as I was kind of rushed and a little inexperience with putting the database together. It's for work and sometimes management just doesn't want to wait, they are so negative.
In brief, most everything is in 1 table and I know from reading this forum that I shouldn't do that, but that's another story.
Further, a claim# is tied together by the same claimant, the relationship code is what separates the claimant with the family, the insured id# is used for all claimants within the family.
You can also tie the claim# to a provider id#, some providers such as clinics and large hospitals have multiple providers that use the same provider id#, so a suffix code is used to separate the providers within that same #.
Please feel free to ask additional questions and I will give you the additional information you need to help me. Thanks again.
P.S. - Last year I created the database and this year I am improving it, so expect more posts from me in the future. I really appreciate all the help I get from everyone here!!!!
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