Forms :: DateDiff Function In A Calculated Field
Sep 15, 2013
I am struggling with the DateDiff fuction in a calculated field. After some study, I have used several variations of:
=(DateDiff("d",[DUED],Date())/7)
to calculate the time (in weeks) until a due date starting from today's date.
It continually turns up a specific date in the late 18 and early 1900's. It does not give me the number in weeks which was what I was hoping for.
Earlier I used a very simple: =DateDiff("m",[Birthdate],Date()) to calculate the age from a date of birth perfectly with no problems.
I do not understand why the formula is not working. Does it have to do with format or the fact that I am working with a future date and how can I rectify this problem?
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Jan 21, 2014
Basically my database is for a library based on borrowing/returning books ect
Everything works except this one thing, in one of my forms I can ask the user to input a book number of the book they want to check if it has been returned or not, if it hasnt been returned within 30 days then it will come up with overdue.
The statement im trying to use i cant get it to work.
=IIf([DateDiff("d",[Borrow Date],Now()>30)
I want it to display overdue if the book isn't returned in 30 days of the borrow date.
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Aug 14, 2014
I have a specific question on the datediff function.
My example is =DateDiff("d",[Policy Issue Date],Date()) where [Policy Issue Date] is the inception date of an Insurance Policy.
I need to determine how many days the policy has been inforce. The formula works great in a query and I can see the number of days in that field when the query is run.
However, my dilemma is I want the same function to run off of a text box using its control source property and have the number of days calculate and be visible for each record on the form. This part is not working and the field is returning the #Error? message.
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Jan 30, 2014
I have a project at hand and it's been a predecessor of mine and client has asked me to do some work on it and extend functionality - but I have not really delved into Access before and I have had to worked my way through to this final snag :/
The Main Form has one sub form. This sub form allows the user to add multiple order items i.e. qty, stock, description from records within the system - fairly straight forward.At the last column of each row is the sub total of those particular items i.e.
Qty Unit | Item ID | Total
-----------------------
2 | 1234 | 80.00
------------------------
1 | 43526 | 20.00
------------------------
> | |
So the total is a function of =[Qty Unit] * [Unit Price].Then in the Footer of this SubForm is the Sub Total
=SUM([Qty Unit] * [Unit Price])
All fine and well..... However, the additional functionality kicks in.
Lets add the additional customer_id from the Main Form. Each Item bought is dependent on the customer_id i.e. they get special prices depending on who they are.So a New table is made which has the Item ID and SpecialPriceID (of a table to define as a specialPrice) and the Price linked to this Item and Special Price category. So say that there are two groups of users "wholesale" and "nonwholesale" these would be SP_1 and SP_2 and each client is defined either one of these, and each stock item has a Price for each SP_1 and SP_2. Hopefully I've explained myself there.
Back to the SubForm. So now the Total needs to calculated differently with needed the external customer_id from the Main Form.
Code:
Function CalculateSpecialPrice(ItemID As String, CustomerID As String, Unit As Integer)
Dim SPSelect As String
SPSelect = "SELECT Price FROM [Items_SpecialPrices] WHERE"
SPSelect = SPSelect & " ItemID = '" & ItemID
SPSelect = SPSelect & "' AND SpecialPriceID = (SELECT SpecialPriceID FROM Customers WHERE customer_id = " & CustomerID & ") "
[code]....
its the sub total I just keep on getting #Error on. I have even watched (using alerts) that the correct return variable is the same as the individual rows. This is the equation I used for the SubTotal within the footer.
=SUM(CalculateSpecialPrice([Item ID], [Form]![FormName]![CustomerID], [Qty Unit]))
#Error
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Jan 18, 2008
Hello,
I am trying to create a query that subtracts "TimeOUT" from "TimeIN" fields to calculate the total time worked.
The "TotalTime" is a new field that is not in the table, only in the query.
I am attempting to use the DateDiff function to calculate this, but I need to return both hours and minutes.
Currently, it looks like this:
Total Time: DateDiff("h",[Time IN],[Time OUT])
It works this way to return the total time in hours only.
The DateDiff function works to return either hours (h) or minutes (n) but I cannot figure out how to get both!
Perhaps someone has an answer or possibly a better way to get the results in hour:minute format for me??!!
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Sep 16, 2005
I'm trying to add a txtfield that the control source is 65 years prior the current date.
So the control source should come up with "1940". I've tried the datediff function, but not having any luck...any suggestions?
Thanks.
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May 9, 2007
Hello,
I would like to ask if I would like to count the number of days between two date, but EXCLUDE Fridays, Saturdays, Sundays since the workers ONLY work Monday thru Thursday. I am using the function DateDiff as follow:
DateDiff("d",[Date1],[Date2]) with Date 2 is later than Date 1.
However, the results count calendar days. HOW do I exclude Fridays thru Sundays fall within Date 1 AND Date 2?
Please help!
Thanks so much,
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Aug 29, 2005
Hey, its been a while since I've posted here, wow.
I had a database that contained samples on different date functions
(first of the month, last of the month, first weekday, etc...)
I can not find it, I have tried searching. I am pretty sure I got it from here.
Does anyone know where this is?
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Dec 11, 2005
Hi all
l'm running a query that has a field with the following formula;
[Anniv_date]=01/03/2006
[NextEBDay]=01/07/2006
[LastPayToDate]= In this case is 25/11/2005
To_Anniv_wks: IIf([Anniv_date]<[Forms]![DateEB]![NextEBDay],(DateDiff("w",[Forms]![DateEB]![LastPayToDate],[Anniv_date])),0)
The result returns 13. However l know the answer should be 14. Coz when l enter the information in excel l get 13.71.
l've tried using the round function with no luck. Any suggestions would be appreciated.
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Apr 11, 2008
Hi All
I've created a database where a query who'se result is loaded on a form uses following function --
DateDiff('d',Date(),[Target Date])-(DateDiff('ww',Date(),[Target Date])*2)-(Select Count(*) from [tblHolidays] where [HolidayDate] between Date() and [Target Date])
I've notice that 2 ppl get an error message when they try to open database, with thatt function coming on an error message
Does this mean they have older access version ?
How can I tell ? Any advise on what to do ?
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Dec 28, 2007
I am finishing up a database that logs basic activities/tasks for my coworkers. As they go in to the database and log an activity in it stays open until they end their day or they start a new task. All this works fine, but the problem comes when I try to determine the total time spent (in hours) on each activity/task. I have written similar queries before and they worked just fine, but for some reason I am having trouble getting this one to work. Here is the expression I'm using...
Time Diff (in hrs): DateDiff("h",[Sample_TM_Table_1]![Time_In],[Sample_TM_Table_1]![Time_Out])
Unfortunately, say Time_In = 8:32:38 am and Time_Out = 8:33:03 am
The expression says that is equal to 946632.
For another Time_In = 8:33:00 am and Time_Out = 3:18:19 PM.
The expression says this equals 946639.
I have tried changing the format of the date/time in both Time_In and Time_Out fields to ensure they were the same and cross checked the expression but still get the same answers each time. Even when I try to use "n" for the interval or "s" it is still highly incorrect. The only thing that makes me think I still have a formatting issue is that the Time_In shows a long date on the results table while Time_Out shows it in a general date format. However, when I go into both the table and the queries to check the formatting they both show general date. Any ideas? I'm all out! Thanks in advance.
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Apr 22, 2013
I am trying to calculate the difference in dates between two fields. How do I find the difference in days between field one which contains the date 04/12/2011 and field two which contains the date 04/12/2013? I have tried to use the datediff function, but it keeps telling me it doesn't recognize the field name, even though the spellings correct.
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May 18, 2013
I am trying to calculate how many days are left till end of contract...
whats wrong with this formula
=DateDiff("d",[Completion_Date], Date())
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Jul 13, 2015
My form is a datasheet with 2 fields: "Product" and "Quantity". Obviously I can't add a calculated field in this type of form; however I would like the word " Total" to display in the "Quantity" field just under the last record. I would also like the sum of the "Quantity" field to display at the bottom of the "Quantity" field in the empty record below the last record.
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Feb 18, 2015
I have a simple access database which up until now was working as it should. Then i made a Backup of the database Named it something different deleted certain data from the backup and when i went back into the original DB i now have #Name? where it used to calculate 2 fields.
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Feb 8, 2014
I'm trying to sum a couple of columns from a subform datasheet and carry them onto the main form.
My main form, [frm_tours_details], holds subform [sbfTours] which is a datasheet.
On [sbfTours], I've got a couple calculated fields within the datasheet, one, called "txtStudentSum", which calculates number of people total ([students]+[adults]+[numfreeteachers]) and one, called "txtptotal", which calculates fee for the program based on the following formula:
Code:
=IIf([txtMonth]>=10 Or [txtMonth]<=4,([Students]+[Adults])*7,([Students]+[Adults])*8)
(The fee is $8/person in season, and $7/person out of season.)
I've been following online directions I found to put a text box in the form footer which then sums each of these calculated fields ("txtStudentSum" & "txtptotal"), and then reference these text boxes from my main form.
However, the main form text boxes just come up as #Name? or #Error when I try to reference these boxes on the subform. Or, sometimes, the one calculating total students will show the total of ALL students, adults in the database, not just those for this particular record-but only, it seems, if I have the subform open separately first, then load the main form. I also tried putting the whole original calculations into text boxes on the main form, but they will only reflect either the current record selected in the subform, or they will only show the first record, regardless of what you've selected, depending on which way I tried.
I've attached a copy of the database ... click on the tab 'tours', then click on, say, tour #6 (since this one is multiple programs and needs to calculate) to open the tour details form.
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May 31, 2013
I have a main form with several with four subforms. On the main form I have a bound text box [ShiftTotal] I have on each subform a unbound text box that sums a field [ExtTaxIn]. I am working with just one subform till I can get it to work correctly. The code I am using on the after update event is as follows.
code
Private Sub TxtSoldQty_AfterUpdate()
On Error GoTo HandleError
Me.ExtTaxIn = (Me.TxtSoldQty * Me.TaxIn)
Me.ExtPrice = (Me.TxtSoldQty * Me.Price)
Me.InvSold = (Me.TxtSoldQty * Me.UnitOfSale)
Forms!frmShiftMain!TxtShiftTotal = Forms!frmShiftMain!TxtRunningTotal
Me.txtExtTaxIn.Requery
[code]...
This sort of works but the [ShiftTotal] on the main form is always one table row behind. I think this is because of the order the event fires.
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Mar 12, 2014
I have a form with three fields named 'quantity' (numberfield), 'service' (combo box) and 'amount' (calculated field with controlsource =[service].[Column](2)*[quantity].
I try to sum the amount field in the formfooter with =Sum([service].[Column](2)*[quantity]) but I receive an error.
Somehow it does not get the value for [service].[Column](2)
How can I do this?
The table for the form is called customer_detail
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Nov 9, 2014
I've got a subform (simple table view) inside a main form, the subform (sfrmRecipes) just has an IngID field (which stores ingredient ID's) and a percentage field
I've added a few calculated fields to this subform, to assist users in making decisions, however each of these fields needs a sum total
So far my percentage field (which is an actual stored field in tblRecipes) is the only one with a functioning sum
for some reason the two calculated fields (which are both plain numbers, no text) do not give me a sum total option, i am only able to use the count function on them
Why calculated fields dont sum up and if there is an easy way to get it working (tried creating my own text field in the footer and manually typing SUM(fieldname), but it does not work).
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Jan 14, 2015
My form has a button that has a calculated field on it (a dcount(...)). When the button is clicked, a couple of conditions are checked and if all is ok, it runs the vba code. If the tests fail, it returns to the form without running the code. All works correctly, except that the dcount number has disappeared. I finally figured out that it is now hidden behind the button. How do I bring it forward again programmatically?
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Apr 13, 2013
A textbox on a form concatenates 2 strings. I want to insert that resulting string into a table .how can i do that ?
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Apr 6, 2013
I have a form that is displayed continuously and there is a text field in it (Text12).In the footer of this form I would like to add a textbox that is the sum of all Text12's on the form.I tried =Sum([Text12]) in the textboxes control source but that is just displaying an error when I run the form.
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Oct 16, 2014
I have an unbound calculated field [Txt1] that I would like to show the result as currency. The fields in the calculation are:
[CR] number, currency
[Commission1] general number, two decimal places
[Commission2] general number, two decimal places
The calculation is: CR15W * (1 - Commission1) * (1 - Commission2)
If I just set the field to currency it works fine. But I want the field to show the following:
"Some Text" & " " & Format(Calculation, "Currency")
When I tried to include the format it to currency I get type mismatch, run time error 13.
So I thought that perhaps I should try the following just to see where my error starts and I get the same error message when I use:
Dim Val1 As String
Val1 = CR15W * (1 - Commission1) * (1 - Commission2)
Txt1 = Format(Val1, "Currency")
Everything I have read says the formula is:
Format([Calculation], "Currency")
Is correct. So why won't it work for me?
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Sep 18, 2014
We have a recent issue on client PC. After application running for a while, all the sudden the calculated field on the form not showing the details, though there is data on the control. After restart the PC, the calculated field display correctly. We guess this may be due to the theme we use.
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Aug 21, 2013
I have a subform embedded in a main form, the subform has a field (text box) that is doing automatic calculation so no manual entries are needed from the user. I have tried to pass automatically the final result to a text box in the main form, but all events are not working (afterupdate, On change, On Dirty), etc.
I have a button to do the above mentioned in the main form, but I don’t want to use that button, I want to do all the process from the subform.
Also, from the subform I was able to do click on the button on the main form (programmatically), however MS Access is too quick and the value extracted from the subform is always empty (zero); Acees is finishing before the calculation is done.
I am using MS Access 2010.
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Apr 3, 2014
I have a "Main" form called frmProjects that sports multiple tabs. One of those tabs is labelled "Milestones", into which I inserted a datasheet subform called frmSubMilestones. The table that feeds the subform is tblMilestones. I established the parent / child relationship between frmProject and frmSubMilestones, and everything is working just fine...
To summarize: frmProject as main form -> Milestones Tab on main form -> frmSubMilestones as datasheet subform on the Milestones Tab (there are other tabs that are not subforms).
I have been asked, for each milestone in the frmSubMilestones subform's datasheet, to capture the number of days spent by employees on a monthly basis. The Milestones table and the PersonDays table have a primary key and a foreign key that are similar.
To summarize: frmSubMilestones as subform -> txtAggregatePersonDays as calculated Textbox fetching data from tblPersonDays -> OnClick event -> FormLoad of frmPersonDays as datasheet PopUp form.
DoCmd.FormLoad is supplied with the usual parameters to make the PopUp form appear, filtered on the currently highlighted milestone. Everything works fine so far... well almost.
Problem 1: When I introduce new rows in the frmPersonsDays datasheet, everything seems fine at the surface, BUT the primary key of the calling form (i.e. frmSubMilestones) does not appear in the tblPersonDays table; this is normal because there is no form-based parent / child relationship between the two forms. As one might expect, I am trying, from frmPersonDays, to get the primary key value from the "parent" frmSubMilestones using the Forms collection. No dice. I surfed and surfed, tried the bang and the dot operators, drank scotch, but nothing worked. I had to add foreing keys manually in tblPersonDays to further my tests. I can't figure out how to reach any control on the calling form, which is a subform.
Problem 2: The calculated txtAggregatePersonDays on the frmSubMilestones works wonders for existing data in tblPersonDays. However, when I introduce new rows in the PopUp form, I also realized that the calculated Textbox in frmSubMilestones is not updated when I close the frmPersonDays PopUp. I have to close the PopUp form and move the cursor in the Main form (frmProjects) to refresh its associated milestones.
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