Calculate Weekly Payroll Hours

I have a payroll form with employees & their time in(emp1ti) & time out(emp1to) that is filled out daily.  I have an expression to calculate an employee's daily hours minus 1/2 hour for lunch in the control source property of a box used just for display: =(DateDiff("n",[emp1ti],[emp1to])/60)-0.5

I need to also display total weekly hours on the form.  I have a table field (emp1twh) that I would like to write the daily time as an integer to.  I would like to add to that field every day's daily hours until it is Monday again, then overwrite the field.  The new value should be displayed as soon as the new timein and timeout are entered.  I have the following psuedo code, but am unsure where to put it and how to update my table field:

If DatePart("d", emp1ti[,2]) = 2
   Then emp1twh=(DateDiff("n",[emp1ti],[emp1to])/60)-0.5

Any help is much appreciated.  I am new to VBA.

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Alan WarrenApplications DeveloperCommented:
Hi Jessica,

Something like this may do:

SELECT [tblTimeClock].[IN], [tblTimeClock].[Out], Format(DateAdd("s",DateDiff("s",[In],([Out])),(Date())),"hh:nn:ss") AS Hours, "00:45:00" AS Lunch, Format(DateAdd("s",DateDiff("s",[In],([Out])),(Date()-#12/30/1899 0:45:0#)),"hh:nn:ss") AS Net
FROM tblTimeClock;

Just change the fieldnames:

IN > emp1ti
Out > emp1to
tblTimeClock > YourTable

Alan :)
Alan WarrenApplications DeveloperCommented:
My employees got 45 minutes for lunch.
Yours would be 00:30:00" AS Lunch

Alan :)
Alan WarrenApplications DeveloperCommented:
SELECT [tblTimeClock].[emp1ti], [tblTimeClock].[emp1to], Format(DateAdd("s",DateDiff("s",[emp1ti],([emp1to])),(Date())),"hh:nn:ss") AS Hours, "00:30:00" AS Lunch, Format(DateAdd("s",DateDiff("s",[emp1ti],([emp1to])),(Date()-#12/30/1899 0:30:0#)),"hh:nn:ss") AS emp1twh
FROM tblYourTable;
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Mike EghtebasDatabase and Application DeveloperCommented:
A very good solusion Alan.  Mike
jlbillingsleyAuthor Commented:
Where does this go?  I keep getting a syntax error.
Alan WarrenApplications DeveloperCommented:
Hi Jessica,

If you want to use it as a calculated field in a report or form add this to the controlsource property for the calculated field.
=Format(DateAdd("s",DateDiff("s",[emp1ti],([emp1to])),(Date()-#12/30/1899 0:30:0#)),"hh:nn:ss")

If you want to include it in the form or reports recordsource you need to edit the recordsource for the form or report by clicking the build button [...] alongside the Record Source property in the form/report properties dialog.This will invoke a query builder based on the current recordsource.

To add a calculated field in query design view, in a new field add:
emp1twh: Format(DateAdd("s",DateDiff("s",[emp1ti],([emp1to])),(Date()-#12/30/1899 0:30:0#)),"hh:nn:ss")

Then set the controlsource of your calculated field in your form/report to: emp1twh

If you are still having difficulty, thats OK, just let me know and we can take this one step at a time from the top.
Initially we aim to provide a quick response, treating questions with greater points associated with greater urgency. I am more than willing to walk through this with you.

Alan :)

SELECT,sum(([Table]![emt1to]-[Table]![emp1ti])*24 - 0.5) AS Expr1
FROM Table
where = 1
group by;
jlbillingsleyAuthor Commented:
Maybe I wasn't clear in my original question.  This appears to calculate only the hours between the employee's time-in & time-out.  My expression takes care of this.  I also like that my expression returns an integer number.  The part I need assistance with is a running total of total weekly hours worked on the form.  I want to add to the total weekly hours field until it is Monday again, and then I want to overwrite the field and start over.  I have the following pseudo code:

My fields are emp1ti(employee time in), emp1to(employee time out), and emp1twh(employee total weekly hours)

If DatePart("d", emp1ti[,2]) = 2
   Then emp1twh=(DateDiff("n",[emp1ti],[emp1to])/60)-0.5

jlbillingsleyAuthor Commented:
If it's Monday, (start over) write the integer difference between employee time in and employee time out minus 1/2 hour for lunch.
Otherwise, add what already exists in that table field: employee total weekly hours, to the integer difference between employee time in and employee time out minus 1/2 hour for lunch.
Alan WarrenApplications DeveloperCommented:
Hi Jessica,

I think I've got the picture now!

You didnt mention whether employees had a unique ID, so I assumed that they did and called mine empID.
I also assumed the name of the table that your form is sourced on is called tblEmployees.
These two assumptions may need to modified to fit.

Here is a Sub Procedure that you can assign to the After Update Event for your form field emp1to.

So after a value is entered in emp1to this sub should fire and produce a message box showing hours worked for the current employee for the Week-Block beginning from the Monday prior to emp1ti to the Monday after emp1ti. allowing for the possibility that empt1i is a Monday. Phew!

Private Sub emp1to_AfterUpdate()
  Dim iWeekday As Integer
  Dim fDate As Date
  Dim tDate As Date
  Dim dTotalHoursWorked As Double
  Dim sWhere As String
  Dim sql As String
  Dim rs As ADODB.Recordset
  If Nz(emp1ti, 0) = 0 Then: Exit Sub
  If Nz(emp1to, 0) = 0 Then: Exit Sub
  Me.emp1tdh = (DateDiff("n", [emp1ti], [emp1to]) / 60) - 0.5
  ' Establish the range
  fDate = emp1ti
  iWeekday = Weekday(fDate)
  ' establish lower date range
  ' calculate date for previous monday from emp1ti
  ' if emp1ti is monday use emp1ti
  While iWeekday <> 2
    fDate = DateAdd("d", -1, fDate)
    iWeekday = Weekday(fDate)
  fDate = Format(fDate, "dd-mmm-yyyy")
  ' establish upper date range
  tDate = Format(DateAdd("d", 7, fDate), "dd-mmm-yyyy")
  ' Build the query string
  ' Filter between date range (fDate and tdate) and EmpID
  sWhere = " WHERE (((tblEmployees.emp1ti) Between #" & fDate & "# And #" & tDate & "#"
  sWhere = sWhere & ") AND ((tblEmployees.empID)=" & empID & "))"
  sql = "SELECT Sum((DateDiff('n',[emp1ti],[emp1to])/60)-0.5) AS calcDailyHours From tblEmployees"
  sql = sql & sWhere
  Set rs = New ADODB.Recordset
  rs.Open sql, CurrentProject.Connection, adOpenForwardOnly, adLockReadOnly
  If Not rs.BOF And Not rs.EOF Then
    dTotalHoursWorked = rs!CalcDailyHours
  End If
  MsgBox "This employee (" & empID & ") has worked: " & dTotalHoursWorked & " this week"
  ' You can set your field value here
  ' Me.emp1twh = dTotalHoursWorked
  Set rs = Nothing

End Sub

Alan :)

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Alan WarrenApplications DeveloperCommented:
Hi Jessica,

You can drop this line I was using it for testing, I created a temp field in the table to calculate hours on a daily basis:

 Me.emp1tdh = (DateDiff("n", [emp1ti], [emp1to]) / 60) - 0.5

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