DateDiff Value If Same Date/field Predates/is Null
Sep 24, 2004
I'm really lost on this one...
How do I find the # of days it takes to complete a task between two date fields.
For example:
[DateRec] field is the field the app was first input to the database. [DateNumb] field is the date the first task was completed. So I understand,
=DateDiff("dd", [DateRec], [DateNumb]))
But I'm getting an #Error because often these two dates are the same date/equal, Or/ the DateNumb field may pre-date the DateRec date. Or/ one or both fields might be Null (blank). How do I set the formula on this?
Bottomline,I need to find the average # of days it takes to complete a task between two date fields for all tracking records. How do I do That???? HELP!
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Mar 9, 2005
good morning all,
I am using the afterupdate event on this forms field. If this date field is NOT EMPTY, then i want the next field to be visible. Here is the code i have
If Me.quotedate = ????????? Then
Me.quotehow.Visible = True
Else
Me.quotehow.Visible = False
End If
I have done this with text fields where i have a defined data to be = to, but for a date field what do i put in ?????????? to show is not null?
Thanks
Kevin
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Mar 27, 2006
So I went searching through the forums and found a thread that provided coding for getting the # of years and months from two dates:
Function fAgeYM(StartDate As Date, EndDate As Date) As String
'Purpose: Returns the difference between StartDate and Date in full years and months
'To call:
' ? fAgeYM(#1/21/04#, #1/19/06#)
'Returns:
' 1 years 11 months
Dim intHold As Integer
intHold = Int(DateDiff("m", StartDate, EndDate)) + _
(EndDate < DateSerial(Year(EndDate), Month(EndDate), Day(StartDate)))
fAgeYM = Int(intHold / 12) & " years " & intHold Mod 12 & " months "
End Function
------------------------------------------
That's perfect for what I'm wanting but I'm doing it with Hire/Term dates. So I want to be able to see how long past and present employees have worked in the company. Obviously that makes the Term field Null at times. With the coding above it requires a date to be in the EndDate field. How can I change it to allow for a null field in which the field would essentially be the current day's date? [Now()]
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Sep 4, 2013
I have a form that runs a search query.
I have an error trap set on a date field.
If (DataErr = 2113) Then
Select Case Screen.ActiveControl.Name
Case "DA_Start"
MsgBox "invalid date", vbExclamation
Me.DA_Start. = Null
End Select
Response = acDataErrContinue
End If
End Sub
This will pop up the error message, but will trigger the debuger when gettin to "Me.DA_Start = Null"
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Jan 8, 2015
I have an append query that needs to stop if nothing is entered in the date field. What criteria should I use. Will is stop the query and continue?
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Nov 15, 2014
Error 1: Setting Date Field in Recordset to null
Error 1: Setting Date Field in Recordset to null " data conversation error 3421 "
Solution: If the field is null set it back to itself .
Here is a simple dummy example i wrote to demonstrate the solution ( look for the bold text in side the code )
Code:
Sub Event_btnSaveEndTime ()
dim strEndDate as string
With Form_frmMainForm
strEndTime = .txtEndTime.Value
[code]....
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Aug 19, 2014
I am new to Access. I am after a vba script to run an update query.
I have a table named MYOB_Invent.
I have a Query Named MYOB_Update.
The query is showing records where my field named Test1 is null.
I want to update records with null in the field to today's date (the date of the day that it is run) formatted as 18/08/2014 and the field next to it is named Updated (which is yes/no) from un-ticked to ticked for the updated values.
I would like a vba script to automate the process as I want to automate it via a commandbutton for users.
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May 7, 2013
I have a Continuous form where I am trying to add a calculated feild that allows us to see how many days a client was in hospital. There is a start and end date. I want to see the following: If start date and end date are the same, this should show client in hospital for 1 day, not the default of 0. If start date 5/1/13 and end date is 5/3/13 it should show 3 days in hospital. If start date is 5/1/13 and there is no end date, this should show 7 dates (from start date to today's date or current date). Currently I have
=DateDiff("d",[EStartDate],[EEndDate])-([EStartDate]=[EEndDate])
but it only shows 1 if the start date and end date is the same. I need it to include the start and end dates typed in its equation.
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Dec 16, 2013
I am building a report that has a header with several details followed by a detail section.
What I need to do is make the entire entry not visible on the report if one of the dates is null.
So it looks like this
last first title id memb # date a date b
1. smith , john fng 8521 2356224
5/12/2012 6/20/2013
10/2/2013 (is null)
2. neckbone, jim dude 2548 85858412
6/20/2013 5/5/2014
8/5/2013 2/31/2013
On the report i want the 1st entry (smith john) not to be visible due to the null (B) Date.... but i want it to be visible once the date is entered...
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Sep 23, 2014
I'm new to programming with Access but am attempting to create a new field in a table with an new date based on existing fields in the table.
The current fields are [Frequency], integer, [Risk], text, [Last Audit Date], date/time, and the new field is [Next Audit Date]. [Frequency] is a calculated field based only on [Risk] and is equal to "5" if [Risk] is "Low" and is "3" is [Risk] is "Medium" or "High", and [Frequency] is blank if [Risk] is (thus far it has never been empty).
What I need the new calculated field to do is return "N/A" (or blank, or anything easily separated really) if [Frequency] is blank, or if [Risk] is "Low" or "Medium". If [Risk] is "High", [Next Audit Date] should be equal to [Last Audit Date] plus 3 years. When I try to save the code, I get this message: "The expression could not be saved because its result type, such as binary or NULL, is not supported by the server."
This is my code now:
IIf(IsNull([Frequency]),"",IIf([Risk]="Low","N/A",IIf([Risk]="Medium","N/A",IIf([Last Audit Date]="N/A","N/A",[Last Audit Date]+Year(3)))))
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Nov 16, 2007
I think the title pretty much sums it up....
I have a query where data is first sorted by user input; first field's criteria: [fieldname], then by another field's criteria: Is Null.
I know there are records containing null values in the second field, as I have run a select query with the criteria: Like "*", to make sure they are null, and not zero-length-strings.
The query is refusing to return any results...
Any ideas?
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Jul 8, 2014
I'm trying to create my own database dealing with hiring bikes on a daily basis.
I have created a form for the basic input, including StartDate, StartTime, EndDate and EndTime, followed by TotalDays. I added the time field so that if a client brings a bike back an hour or two after the pickup time on a later date (sounds complicated - e.g he takes it on Monday at 12pm until Thursday 14pm) then he would be charged for an extra day. It is similar to the car rental system used worldwide.
The TotalDays is currently using a simple expression =EndDate-StartDate.
Is there any way to make the form incorporate the time difference so that if EndTime-StartTime>1 then it would add an extra day to the "=EndDate-StartDate" calculation.
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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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Mar 12, 2014
I have a form with Date of Death (DOD) field. I would like update DOD from a table dbo_patient into Z_Patients table.
I have set the datatype as Date/Time in the form for Date of Death.
Code:
Private Sub Update_DOD()
Dim rcMain As New ADODB.Recordset, rcLocalDOD As New ADODB.Recordset
Dim DOD As String
rcMain.Open "select distinct PatientKey from Z_Patients", CurrentProject.Connection
[Code] ....
However I am getting some error Run-time error '-2147217913 Date type mismatch in criteria expression in section below.
Code:
CurrentProject.Connection.Execute "update Z_MAIN_Processed_Patients set DateOfDeath = '" & rcLocalDOD!date_of_death & "' where PatientKey = " & !PatientKey
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Aug 8, 2013
I have a query where I display the [OPEN DATE] and [CLOSE DATE] of my cases. However, when I run this query sometimes the cases are not closed yet, therefore there are null values. However, I also have a field to calculate the datediff between these two dates. I need the [CLOSE DATE] field to display today's date when it is a null value so that I can still get a count of the days using datediff when I run the query.
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Jun 10, 2013
Trying to run a query using criteria to populate the query by looking at information from a field on a form, if from is closed I need that criteria to look at the table and return all date in table.
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Aug 16, 2006
I have a form with two controls: DateFrom & DateToI want to filter based on those criteria but when the criteria is ommitted (NULL) I want to display all.In case of other controls I have an SQL as follows:... WHERE (tblClassesOffered.Course = Forms!frmClassReport.class Or Forms!frmClassReport.class Is Null)But with the dates controls the best I could come up with is:...Between IIf(IsNull([Forms]![frmClassReport].[DateFrom]),#1/1/1900#,[Forms]![frmClassReport].[DateFrom]) And IIf(IsNull([Forms]![frmClassReport].[DateTo]),#1/1/3000#,[Forms]![frmClassReport].[DateTo]) Or Is NullHowever that solution is kind of ugly becasue instead of wild cards (I couldn't make them work) I'm using those made up dates and I also wish not to use the IIF if possible (like the first statement).
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Jan 19, 2005
Good day,
I have a query that returns hours of vacation time taken for each specfic day of the year. But if no time is taken on for example Jan. 19th, that date do not show up in the query. I am wondering is it possible to return all 365 days and display a zero,if nothing is booked for that day. Attached is the db.
Thanks
Chris
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Feb 18, 2015
A form with a text box expecting a date has the validation property as, >#1/1/2010# And Is Not Null. If a date is entered older that this the error is caught however if the field is left null it is not caught as an error. I have tried several modifications of this statement with the same results.
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Jan 13, 2014
I have form that user can filter the records and generate a report but I have difficult trying filter null date.
If I have check box called filter null if it has a tick in I would like it only show records that have no value (is null) in field "date start" but if unticked I would like it to only show records with a date in field "date start" ...
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Jun 17, 2013
I'm trying to search through a table with serial card IDs, Order Numbers, and Ship Dates. I'm search through the Serial Card ID column and making my code work so that if the serial card ID exists and its ship date is between 9/30/2001 and 10/1/2011, then retrieve the associated order number and put in array. All of this works perfectly except for one tiny part : it's not returning a null for either unfound serial Card ID or serial card Ids that exist but their ship dates do not qualify. I would like to return a null value for these fields into the array as well as keep the found values in the array. The whole point of all of this is so I could count the number of rows for all the found order numbers and return a total value with that number.
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Oct 8, 2013
I have this IIF statement however all empty cells are also coming up as Expired. How do I exclude empty cells?
Status: IIf([Expiration Date]>= Date() ,"CURRENT"," EXPIRED")
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Jul 10, 2005
Is there an expression in a query, that if want to say, if one field is not null make another field say true?
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Oct 15, 2005
I have a downtime database that tracks units down, time on, reason down, etc. When a unit goes down, I log the name of the unit and the time down in separate fields. When a unit goes back on line, I log the time on and the reason in separate fields. All this is in a form. When the unit goes on line, I want the user to be forced to enter a reason only after he has entered a time on, not before. The “reason” field must be left blank until the unit is on. How do I do that? I have searched the forum for this and have not found leaving a field blank based on another field’s data. I will supply whatever you need to help me. Thank you.
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Nov 24, 2005
Lock field for a record if another field is null:
I would like to stop users from entering a date in "Ctrl Closed" unless they have populated "Ctrl Reason" for any given record.
Not sure how to do this.
Any ideas would be greatly appreciated.
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Oct 2, 2014
If a new record is created, insert date only if customerID is not null
Private Sub Form_Current()
If "CustomerID", "TblDietPlan" = <> 0 Then
If Me.NewRecord Then Me.MealDate = DMax("MealDate", "TblDietPlan")
End Sub
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