Forms :: Calculate Difference Between Two Query Table Values?
Nov 27, 2014
I am struggling with calculate difference between two query table values, I first created a make a table query(current meter reading) which contains one column called "meter read" , and I created a second make a table query(previous meter reading) which also contains "meter read" column, I linked those two make table queries to calculate the value difference between two date, how can I create a form to calculate diff between any two date?
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Jul 17, 2006
How do I calculate the values between two columns and populate a third column with those new values? I have an ''Actual Cost'' column and ''Budget Cost'' column and I would like to create a third column ''Margin.''
Is this something that needs to be done with a query or can it be handeled in the design view of a table? I'm starting to learn that Access works nothing like Excel.
Thank you in advance for any help. I scanned some of the threads in this forum, but many were beyond my comprehension. Any walk-through of this procedure would be much appreciated.
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Jul 25, 2014
I have looked all over for a way to calculate the difference between water meeter readings. My brain may be Friday slow, but all I can find is for calculating differences in dates. My water table has 3 fields: ReadDate, Reading, Calc1
ReadDate is the date the water reading occurred
Reading is the meter reading
Calc1 is calculated (when I find out how!) by subtracting the current reading from the previous day's reading.
I would like to add the write script in my form so when the readings are entered, the calculation auto populates the field for the user.
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Sep 20, 2014
Trying to calculate the integer difference between Due_Date and Result_Date excluding weekends and holidays.
I have a table (Holidays) with the dates of the holidays in it. The table looks like:
ID Description Holiday
1 New Years 1/1/2014
2 New Years 1/1/2015
So, if Date_Due: 9/25/2014 and Result_Date: 9/29/2014, then TAT = 2
Since 9/27/2014 and 9/28/2014 are weekends they are excluded from the calculation and only that Thursday and Friday are used in the calculation.
Code:
Private Sub Result_Date_AfterUpdate()
[TAT] = NETWORKDAYS(Due_Date, Result_Date, tblHolidays)
End Sub
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Jan 30, 2014
I have a subform in which I want to calculate the difference between a start time and finish time, the problem I am having is when the start time is on a different date to the finish time
Start 23:15 on 14th Jan finish 00:015 on 15th Jan, also I want the answer to be the number of minutes. The fields I have are
BatchStartTime Short Time
BatchFinishTime Short Time
BoilTime ([BatchStartTime] - [BatchFinishTime]) General Number.
There are many batches to enter per job and the MainForm has the StartDate as I didn't want to enter the StartDate for each batch.
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Jan 22, 2012
DateDiff in a query
I am trying to calculate time difference between two time columns as follows in a query which has a few inner joins
Diff: DateDiff("h",[Table1.TimeStrat],[Table1.TimeStrat])
This gives problem, it is asking [Table1.TimeStrat] to be entered, where is the problem?
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Jul 9, 2013
ID Up Time Down Time
John 18:00 15:00
Kelvin 08:00 08:05
Melisa 23:00 02:00
This is the Table , i need the Query result show IF [Up Time]-[Down Time] is >=3 hrs
Like Below :
ID Up Time Down Time
John 18:00 15:00
Melisa 23:00 02:00
IDUp TimeDown TimeJohn18:0015:00Melisa23:0002:00
I tried DateDiff("h",[Up Time],[Down Time]) in Field but POP out with error "Syntax error (comma) in query expression 'Table1.[DateDiff("h",[Up Time],[Down Time])]' " ...
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Dec 11, 2013
I want to be able to display the result of a difference between Date/Time values in "HH.MM" format (i.e. yes I want the result in decimals and I don't want Access to round up or down just because it feels like doing it!). I have used the following:
Example 1:
Dim ActualManHours as Long
ActualManHours = (txtEndTime.Value - txtStartTime.Value) * 86400
txtActualManHours.Value = ActualManHours
Example 2:
Dim ActualManHours as Long
ActualManHours = DateDiff("h",txtStartTime.Value, txtEndTime.Value) & "." & Format(DateDiff("n",txtStartTime.value,txtEndTime. value) Mod 60, "00")
Example 3:
Dim StartTime as Double
Dim EndTime as Double
Dim ActualManHours as Long
StartTime = CDbl(txtStartTime.Value)
EndTime = CDbl(txtEndTime.Value)
ActualManHours = EndTime - StartTime
txtActualManHours.Value = ActualManHours
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Jan 27, 2015
I am designing mileage database in access 2010.
table:
1- maintbl (date, truckNo fillinQty,rate,cost, odometer, mileage)
Query:
1- mainquery (based on maintbl)
Form:
1- mainfrm (Based on mainquery)
i want to calculate mileage :
example:new odometer reading - previous odometer reading / filled in qty
example: 2000 km - 1000 km / 200 liters = 5 liters /km
Objective: How query will automatically calculate the difference of new odometer reading and last odometer reading for a specific truck number and divide it with filled in qty of fuel?
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Aug 3, 2005
Hello,
I,ve made the following date fields in a form: begintime, endtime. I've also made a field Diff that calculates the difference between the two by the code : Diff = Format([begintime] - 1 - ([endtime], "Short Time").
Bij this code you can calculate the difference even over night.
But now I've got to calculate the part of the time someone worked between midnight and 06:00AM if that person indeed worked in those hours.
e.g. someone started at 16:00 end ended at 03:30. The part of time I need = 3:30
e.g. someone started at 01:00 end ended at 11:00. The part of time I need = 5
How can I accomplish this? I hope someone can help me because I'm :confused:
Thnx Remco
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Oct 25, 2014
I have to create a query in access that will calculate two Date and time fields [Date & Time Left]/ [Date Returned], need to figure out between the two fields. Trying to identify when the rep returned the call and the number of business hours (6:00am - 4:30pm) it takes to return a message in Ms Access 2010.
Code:
SELECT [Message Tracking_tbl].[Date & Time Left], [Message Tracking_tbl].[Date Returned], [Message Tracking_tbl].ID
FROM [Message Tracking_tbl];
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Nov 1, 2007
I'm new to building databases and I wouldn't think that this is difficult but it has stumped me and everyone that I have approached to elegantly perform this calculation.
Essentially I have a table of meters (the best real world example is the watermeter that your community uses to measure how much water you use each month.) Each meter in the table has a "child table" of the date/time that the meter was read and the reading on the meter (stored as a number). I need to calculate the difference between the last two readings in the child table for each meter(essentially how much water each meter has used since the last reading.)
I have been able to sum, average, etc. the meter readings, but I can't seem to find a way to get a difference.
Thanks in advance,
Corwin
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Sep 14, 2014
I have the attached database which calculate the Difference between dates.I have also two problems like i shown in the image
Code:
Option Compare Database
Option Explicit
Sub Recalculate()
Dim rst As DAO.Recordset
Dim dff As Long
[code]...
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Apr 25, 2014
I am trying to Calculate the Date difference between "Material Submit Data" and "Current Date" excluding Weekends.
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Jun 2, 2015
I'm trying to calculate the difference between start and end time, which works fine with:
Total Time: DateDiff("n",[tblTaskTimes]![StartTime],[tblTaskTimes]![EndTime])
However, this is for a database that calculates billable time in 10th of an hour. So, for example, 1 hours would be 1, 30 minutes would be .5, less than 6 minutes would be .1.
The format for this expression is set up to a general number, if that matters.
It's gotta be something in the formula like multiplying this by 24 (for 24 hours) and then dividing by something. Nothing I'm trying is working.
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Nov 21, 2013
How to implement a functionality into my access database. The related tables required for this functionality can be found as an attachment.
When the information has been entered into the tables by the user, I would like to calculate the difference between the information for each part within the same table. The main columns for which the difference have to be calculated are: [RefObsInfo->RefSources] and [AltObsInfo->StatusAltSource] and [GenObsInfo->GenSources]. The values for these fields are restricted to 3 or 4 different ones. I also would like to show if the GenEstAvailable columns are changed, but that's for later.
In order to calculate this difference a query has to select for each Part the information related to the last date AND a date which has been specified by the user (with the previous date as max). For this the user is asked to give a from date, which she/he can select from a combobox. This combobox has a standard selected value which is the MaxDate-1, i.e. the previous date. The difference should be calculated from the previous date to the last date. I would prefer to give each (predefined) difference a specific action to show the user the difference in a matter of seconds.
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Sep 20, 2014
Basically, I am trying to calculate a integer number difference from two dates (TAT = Due-Date - Result_Date). The number is calculated and excludes weekends and ideally holidays (for that I have a tblHoliday but not sure how to use it). The function below seems to calculate a number but doesn't exclude weekends.
For example, if Due_Date is 9/26/2014 and Result_Date is 9/30/2014, then TAT is calculated to be 5 (should be 2).Since 9/26/2014 is a Friday only Friday and Monday are used in the calculation.
Code:
Option Compare Database
Public Function WorkingDays(StartDate As Date, EndDate As Date) As Long
Dim intCount As Long
intCount = 0
[code]...
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Jun 8, 2015
How can I calculate the difference between two dates but I only want to count the work days? So if was today and I wanted to go until 6/15/2015 the difference would be 5 and not 7 because I do not want to count Saturday or Sunday. Is there a special %datediff function where I would only count work days?
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Aug 10, 2015
How to set up my tables as I'm just starting off with setting my database up.
I'm doing a simple database to track the purchase orders (PO) I am managing. Each PO has a PO Number and an Original Value. POs may have multiple amendments which would change the PO value. I would however like to keep the history of the PO original value and all different amendments.
So I created two tables:
tblPO:
ID
PO Number (Number)
PO Original Value (Currency)
PO Sum of Amendments (???????????)
PO Current Value (Calculated = PO Original - PO Sum of Amendments)
tblPOAmendments:
ID
PO (Lookup from tblPO)
PO Amended Value (Currency)
Amendment Date (Date/Time)
Amendment Desc (Text)
Now the two, million dollar questions are:
1.) Is this the right table structure to use.
2.) How do I go about calculating the Sum of Amendments field?
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Nov 18, 2011
I have a problem in doing a task with my form. Actually I have a button to add a new record which opens a new form there i enter the values to the record. But when I press the Addnew record button I want to calculate the maximum of the Identity field +1 and open the new form with that new number which i have calculated. How can i do this....
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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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Oct 26, 2014
I have to create a query in access that will calculate two Date and time fields [Date & Time Left]/ [Date Returned], need to figure out between the two fields. Trying to identify when the rep returned the call and the number of business hours (6:00am - 4:30pm) it takes to return a message in Ms Access 2010.
The only issue is the calculation has to be done by time and so I have to calculate what time they left the message(so the difference between [Date & Time Left] and [Date Returned) [Date & Time Left] and when the rep returned the message which is suppose to be [Date Returned] but the problem with this field is the data entry is in date format (10/9/2014, 00/00/0000) of Date and not Date and Time like the [Date & Time Left] field, so I don't know what to do now. Not sure what to do now not a database that create or have allot of control over.
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Jul 12, 2005
Hi everybody. I got a access 2000 query that lists :
1)weekno
2)year
3)project (project number )
4)QweekylyReportHeader (project description )
5)customer (customer that requested this project)
6)department (department number and name that implements this project)
7)Projectleader ( project leader name and number that is responsible for this project)
8)Task (Task number that is done for this project )
9)task description (description of task )
10)employee ( employee number who is working in this project )
11)name (Employee name and initial and last that works for this project )
12)hours ( number of hours employee worked in this task ) ==> i want cumulative for this
13)salary (amount of salary given to this employee) ===>i want cumulative for this
I want to create another query that lists :
A)cumulative value of hours worked on particular project task up that point.
b)cumulative value for wages given for that project task up that point.
http://i5.photobucket.com/albums/y180/method007/weeklyprojectdata2.jpg ( query output sample)
The above query ONLY lists hours worked and wages gives for particular project task only during
each week.But i want hours worked and wages give for particle project task up to that point in week. For
example a project task might have implemented last week but not this so i want to take that in calculation as well.
I be happy if some expert show me how i can calculate the cumulative value for hours worked and wages given for particular
project task.
Notes:
- There is a possibility that during a particular week no task been implement for particular project.
- One employee can work in more then one project
- One employee can have more then one salary (amount) for the same
project because he might get raise in salary!
- Only tasks carried this week will be printed in the weekly report
http://i5.photobucket.com/albums/y180/method007/constraint.jpg ( pic of database)
http://i5.photobucket.com/albums/y180/method007/hourlywagesroportfinal.jpg ( query output population)
http://i5.photobucket.com/albums/y180/method007/queryindesign.jpg (query in design view)
query that display hourly wages of certain project during each week
SELECT
querythisweek.weekno,
querythisweek.Year,
querythisweek.Project,
QweeklyReportHeader.Customer,
QweeklyReportHeader.Department,
QweeklyReportHeader.description,
QweeklyReportHeader.ProjectLeader,
querythisweek.Task,
dbo_Task.description,
querythisweek.Employee,
[lastname] & ' ' & [initials] & ' ' & [insertion] AS Name,
querythisweek.hours,
querythisweek.Salary
FROM
dbo_Task
INNER JOIN ((QweeklyReportHeader INNER JOIN querythisweek ON QweeklyReportHeader.projectno = querythisweek.Project) INNER JOIN dbo_Employee ON querythisweek.Employee = dbo_Employee.employeeno) ON dbo_Task.taskcode = querythisweek.Task;
code for querythis week( calcualte the salary and hours worked)
SELECT dbo_Hours_worked.Project, dbo_Hours_worked.Year, dbo_Hours_worked.weekno, dbo_Hours_worked.Task, dbo_Hours_worked.Employee, dbo_Hours_worked.hours, (select a.amount * dbo_Hours_worked.hours
from dbo_Hourly_wages a
where dbo_Hours_worked.Employee = a.Employee
and dbo_Hours_worked.Project = a.Project
and a.Year * 100 + a.weekno = (select max(b.Year *100 + b.weekno)
from dbo_Hourly_wages b
where b.Year < dbo_Hours_worked.Year
or (b.Year = dbo_Hours_worked.Year and b.weekno <= dbo_Hours_worked.weekno))) AS Salary
FROM dbo_Hours_worked;
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Oct 23, 2013
I want to add three fields in a table namely from, to and diff .
How to add them in a form so that I can enter
The time in (xx:xx) 24hr format in the "from" and "to" fields and calculate and save the time difference in minutes to the "diff" field automatically.
I am using access 2010.
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May 2, 2013
I'm trying to make a query where it can calculate the difference between a table field value and a query field value.
Ex. Table INVOICE - fields
invoice no, invoice value,
Query TOTAL - fields
invoice no total invoice value
I need to get the difference between invoice value and total invoice value.
How can I put this into a query (invoice value - total invoice value)?
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Jan 27, 2015
I have an option group which should display a value from a table if txtWords is null, but the result of a query if txtWords is not null. But though it shows the right results when I load the form, updating txtWords gives me all sorts of errors.
txtWords is in the main form, while the option group optLengthCat is in a subform (but inline).
Form_OnCurrent() event:
Code:
'Enable or disable the option group
If Len(Me.txtWords.Value & vbNullString) = 0 Then
Me.fsubLengthCat.Form!optLengthCat.Enabled = True
Else
Me.fsubLengthCat.Form!optLengthCat.Enabled = False
[Code] .....
When I put this into txtWords_AfterUpdate() it starts throwing up errors. Specifically, when I delete a subform record using SQL I get 'record was already deleted by another user'; I think I might have fixed the problem with Me.Requery, but it feels really inefficient.
Should I be using an unbound control? If yes, how do I make an unbound control that can edit or add new records?
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