I am using an Access 2013 form for calculations. I have a user inputting the hours they work in a text box for each day of the week. Labeled accordingly txtMonday, txtTuesday etc. I have a text box for all the hours worked txtTotalHours which I am setting the default value for with this formula =NZ(txtMonday,0)+NZ(txtTuesday,0)+NZ(txtWednesday,0)+NZ(txtThursday,0)+NZ(txtFriday,0)+NZ(txtSaturday,0)+NZ(txtSunday,0) this presents an error of #Size!
I thought the NZ() would account for any issues, but I still get an error. What can I do to overcome this error and have my calculation show a 0 if all the days are zero or null or blank, OR the SUM if the days have a value input?
I think you need to do two things
First wrap each NZ calc in a Val() function - in case it's actually concatenating the text box values as strings - before you trying to convert to an integer value - assuming you have the TotalHours field defined as integer - you didn't say.
Second put the formula in the ControlSource property (not DefaultValue) and then if you actually want it bound to a field, use code to update the actual field AfterUpdate
=Val(NZ(txtMonday,0))+Val(NZ(txtTuesday,0))+Val(NZ(txtWednesday,0))+Val(NZ(txtThursday,0))+Val(NZ(txtFriday,0))+Val(NZ(txtSaturday,0))+Val(NZ(txtSunday,0))
Related
Is is possible in a Table to Calculate differences between Dates if the Value in the field is considered "short text"?
I am working to convert an Excel macro database into Access one and I have imported the data from the Excel file into an Access Table.
however i realized 2 feilds that count up until closure are now just fixed numbers but need to add up as each day passes until closure
when i imported the Dates became Short Text.
is there an expression that would handle this situation?
Each record has a serialized non repeating ID number seperate from access as well.
Dates I have are
OfficialissuanceDate,
DatePlanSubmitted,
DatePlanCompletedSubmitted,
DateClosed,
I need 2 calculations that increments daily when DateplanSubmitted and DatePlanCompletedSubmitted are null
Both comparing to OfficialIssuanceDate. then stop counting when they are no longer null. (have a date in updated to the record) and retain the value.
I have tried to Google calculating Dates but i get DateDiff function which doesnt appear to work. I've used Access and taken a class on it but never really made a new DB from scratch
Dates in a text field are not actual dates, just strings of characters. A Date/Time field stores value as a double number then displays in a date structure - "dd/mm/yyyy" is Access default structure.
Sometimes Access will do implicit conversion of data but not in this case. Either change field type to Date/Time or do conversion with CDate() function. However, you will find that conversion functions error with Null input.
Arithmetic operation with Date/Time field type is possible. However, arithmetic when any term is null returns Null so have to deal with that. One way uses Nz() function: Nz([DateClosed], Date()) - [DateOpened]. Unfortunately, Nz() is not available in table Calculated field type, so do that calc in query or textbox. Most developers avoid table Calculated field type. If you really want to use, expression would have to be: IIf(IsNull([DateClosed), Date(), [DateClosed]) - [DateOpened].
I have an Access data table with the Field "RequiredUntil", which is from the type "Date/Time", and several other columns, and a form, in which I show that table, and where I usually use right mouse click to filter for what I want. The text box for "RequiredUntil" is formatted as "Short Date".
Part of the form:
When I now do a right click on the field "RequiredUntil" in that form, Access properly recognizes that as a date, and offers me several date filters, i.e. Today, "This week", Past,... So I don't use any SQL there, all is done by Access!
When I select "Today" (or Yesterday or Tomorrow), I get a "Data type mismatch in criteria expression" error.
When I select "This week" (or any other time period), the filter is properly set - but as soon as I filter the next column, I get a
Syntax Error in Query expression '((Year([DataTable].[RequiredUntil])=Year(Date())) AND
(DatePart("ww";[DataTable].[RequiredUntil];0)=DatePart("ww",Date(),0))'.
In that case, the date filter is revoked, and only the second filter is applied.
So, I don't do any SQL, RequiredUntil is of the type Date/Time, the text field in the Form is Date/Time, Access recognizes it as Date - what am I missing?
I'm pretty sure, the issue is caused by Null values in your date field.
If removed, you can set the filter, which will reveal as:
(DateSerial(Year([DataTable].[RequiredUntil]), Month([DataTable].[RequiredUntil]), Day([DataTable].[RequiredUntil])) = Date()+1)
which, obviously, will fail, as DateSerial doesn't accept Null values.
As the subject expresses, I'm trying to sum the values of a string field where spaces may exist. It must be done this way, unfortunately.
The database is very old. The original developer chose to make all fields Text fields; to get over the null value problems, a function was written in VB6 to replace any null value with a space. This cannot be changed.
Fast forward to now, I'm trying to create a report that sums the length field without changing spaces to nulls first, and it should be done entirely through the control source property of the report.
I've added some of what I've tried below, but every time the report is run, I receive:
Data Type Mismatch
...and I'm not sure how to get around it.
Ideally, I'd like to keep the users out of the database completely, and just add a combo box that lists the reports created in the database so they can be opened by name without having to run any additional update queries first.
=Sum(IIf([MY_LEN]<>" ",DCount("[MY_LEN]","MY_TABLE"),0))
=Sum(Nz(Iif(Trim([MY_LEN])='',Null,[MY_LEN]),0))
=DSum("[MY_LEN]","[MY_TABLE]","[MY_LEN]<>' '")
=Sum(Iif(Val([MY_LEN])>0,[MY_LEN],0))
=(SELECT Sum([MY_LEN]) AS MyLen FROM MY_TABLE WHERE (((MY_TABLE.[MY_LEN])<>' ')))
Is this possible?
Can't compare anything to Null. Can't say If x = Null Then because Null is undefined. So you can't test if undefined = undefined. Use If IsNull(x) Then in VBA and Is Null in query criteria. Don't really need IIf() for Sum() aggregate, other aggregates such as Count or Avg would.
To handle possible space, empty string, or Null for a text field holding numeric data.
=Sum(Val([MY_LEN] & ""))
I have an Access form with a textbox bound to a currency field in a table. As expected, anything other than a numerical entry generates an error. Occasionally, users need to enter several amounts and have those added together and the result entered into the currency field.
To accomplish this, I would like users to enter an equal sign followed by a valid arithmetical string which would evaluate to a number exactly as they would in an Excel cell. For example, if a user enters "=5.31+2" I want the field to evaluate to "7.31" and use that as the value passed to the table when the record is updated or saved. The current workaround is to use the Calculator application but that isn't the ideal solution.
I tried the following code and applied it to both the BeforeUpdate and OnLostFocus events of the textbox (named "tbxTotal_Paid") but neither worked. I simply got "The value you entered is not valid for this field" error.
Dim charCt As Integer
Dim evalStr As String
If Left(tbxTotal_Paid, 1) = "=" Then
charCt = Len(tbxTotal_Paid)
evalStr = Right(tbxTotal_Paid, charCt - 1)
Me.tbxTotal_Paid = CCur(evalStr)
End If
Is this simply applying the code to the incorrect event or is this a coding issue? Any assistance is appreciated.
For me your code looks fine but you might put it in the wrong place.
Like you said Acess is giving you this error because the textbox is bound to the currency-field. So it will never accept non-numerical values because the value-checking code fires even before the before_update-event.
I think the best solution would be to hide your bound text box using Me.tbxTotal_Paid.Visible = False and creating a surrogate textbox which is not bound. You put your code in the beforeUpdate-Event or Change-Event of your surrogate. At the end you should check your final result with IsNumeric(). That way your surrogate textbox writes only correct values to your bound hidden textbox and only numbers arrive at your table.
An alternative would be to change the currency column to a string-field but this would not be wise because of potential wrong data in your database.
I have the details of my report being summed up in a summary expression, all works fine. The fields are decimal values of hours worked. Thus, the summary value is also a decimal value. I'd like to access the summary value and convert it to hours / minutes. I've labeled the express as "WorkTimeSum", but can't seem to get a handle to it, however. Fields! obviously won't work since it is a summary expression. I was thinking ReportItems! should work, but to no avail. How can I use this expression field (in a summary row) in an expression in the same summary row?
If I've understood correctly, you're asking how to reference the textbox containing the total work hours value so that you can convert it to hours and minutes using an expression in a different textbox?
You can use either ReportItems! e.g.
=ReportItems!Textbox20.Value)
or ReportItems("") e.g.
=ReportItems("Textbox20").Value
to reference the value of another textbox. Be careful with the names as they are case sensitive.
You can use aggregate functions in any expression. For example, in any header rows you can use the following expression to determine the total hours value:
=Floor(Sum(Fields!hours.Value))
Sum(Fields!hours.Value) is just the total hours in whatever context, e.g. the group total if it's a group header row; you can use this expression as an input in any other expression you require.
It sounds like your issue wasn't the conversion itself, so hopefully this points you in the right direction. If you need further information please specify.