Access Rookie - Calculating Difference Between Dates In Format Mm/dd/yyyy Hh:mm
Jan 24, 2008
Hi, I am a longtime Excel user, and am now migrating some work to Access.
I have 2 fields dealing with dates in the format mm/dd/yyyy hh:mm, OPEN and CLOSE
I'd like to get the difference between the two in hours, but I have no idea how or where to do this in Access. I'm assuming it is put into the queries, but it would be easier if I could just put it in the table.
Here is an example
1/1/2008 1:00 1/2/2008 2:00
I want the result to be "25"
Thanks in advance!
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Jun 27, 2005
In access in one field I have one date and in another field I have another date. I want to calculate the number of years.,months and days elapsed between these two date. e.g. suppose in one field I have 30.06.2005 and in other 20.04.2004 then it should show 1 year 2 months and 10 days.
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Nov 18, 2011
I currently have a table that has patient ID (unique record (SSN)) and a date of visit field. The SSN may have numerous rows with different dates of visits. What I am trying to do is a DateDiff function that will retrieve records that are 48 hours apart or 2 days apart. We are tracking patients that return within 48 hours of a previous visit.
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Oct 25, 2013
I have a list of client activity - client name, loan ID and loan date. I would like to create a new field that shows the number of days between one loan and the next. If I was doing it in excel, I would need to sort the data by client name and loan date and then calculate the number of days between the loan date of one loan and the loan date of the loan immediately prior to this.
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Aug 8, 2006
I have a query that is looking to calculate staff absence.
Absence Start date & Return to work date
Looking to calculate number of days (not a problem) but to exclude weekends ie saturday and sunday ????
Not sure if this can be done --- any assistance would be greatly received.
thanks and regards
ian watson
Yarm Cleveland UK
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Apr 5, 2007
Hi everyone
I have 2 date fields date1 and date2 , and i have date/time data type but what i want to be inputed is in dd/mm/yyyy and not mm/dd/yyyy, what do i need to do in accees both date fields properties to make sure it is in UK date format. thanx
I have played with the format and input mask but i am lost dont know what to do.
Thanx
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Oct 14, 2014
My table has many records for each month. I am creating a report that will display only the records in one month of a year. I have been able to create a form that gives the user the choice of the Month and Year for which to create the report. The code I am using to create the combo box is:
Code:
SELECT DISTINCT Month([QTDate]) AS MoNum, Format([QTDate],"mmmm yyyy") AS MoName
FROM MainTBL
ORDER BY Month([QTDate]);
What I need to do now is create the query for the report that displays all records for the chosen month and year. If I simply reference the combo box, all it shows is mmmm yyyy and the days are missing so the query doesn't work. What do I need to do to create the query so it displays all days within the month and date selected?
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Feb 28, 2008
Hi everyone
I'm a very very new access user so many apologies in advance for when I have no idea what I"m talking about.
I'm working on creating a report that will display multiple expiration dates. Currently I have an employee database, not created by me, that has all of our employees professional licenses listed.
Prof license, auto license, liability, etc.
I want to create a report that will tell me what has already expired or will expire in the next 30 days.
I did use this
Between DateAdd("d",-30,Date()) and Date() and it is bringing back info up to 2009. which isn't what I need. I'm sure I'm doing something wrong here.
I want anything that has expired regardless of the date from today, before today, and 30 days from today but I don't care about anything more than 30 days from today's date.
I noticed that when I looked at the existing database that the fields are set as text fields. I tried to change them to dates and it gave me a "deleting 106" records error message. Yikes!
Any help would be appreciated. I don't really understand expressions and I don't understand if I'm supposed to put the actual date in parentheses or what. Please pardon my ignorance.
Many many thanks.
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Feb 22, 2007
I'm trying to create a database for a Cattery business.
One thing I'd like to include is a query that calculates how long a cat has been staying at the cattery and then calculating the amount owed by the owner.
I don't have a cost field in any of my tables, so I need to create this on every run of the query.
So for example
A Cat resides in the cattery from the 22nd of Feb to the 28th of Feb. So 6 days (not including the day the cat is brought into the cattery) at a cost of 4.95 a day equals 29.7
Heres what I have so far
http://www.tdh1987.co.uk/pics/query.JPG
Bear in mind I'm from the UK, so the date field is in a different format to yours.
Any help will be greatly appreciated.
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Nov 12, 2007
Hi, I wonder if someone can help me with the following problem:
I have a table with 2 columns,start time and end time, both containing time values in a four digit format, eg 0930 being 9:30am etc.
I have made a query to convert these into the standard format (eg 0930 becomes 09:30), using left/right and & functions.
Now I use the timevalue function to convert the string , eg 09:30m into a recongnised time value.
The problem is now I want to find the difference between the start and end times- but when i try a simple end_time - start_time formule it returns a long number which i dont understand, rather than just giving me the difference betwen the two times.
Im sure there is a simple way to do this which I dont know, can anyone help me out? Thanks in advance!
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Nov 12, 2007
Hi, I wonder if someone can help me with the following problem:
I have a table with 2 columns,start time and end time, both containing time values in a four digit format, eg 0930 being 9:30am etc.
I have made a query to convert these into the standard format (eg 0930 becomes 09:30), using left/right and & functions.
Now I use the timevalue function to convert the string , eg 09:30m into a recongnised time value.
The problem is now I want to find the difference between the start and end times- but when i try a simple end_time - start_time formule it returns a long number which i dont understand, rather than just giving me the difference betwen the two times.
Im sure there is a simple way to do this which I dont know, can anyone help me out? Thanks in advance!
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Nov 12, 2007
I need help to calculate time difference from the record above where ID is same. I have attached an example in excel with this request where I have if statement doing exacly what I want to do in Access. I have a table in Access that has three columns - as below
ID, Reg, TimeDiff
66646, 14/06/2007 21:33,
66646, 15/06/2007 06:03, 8:30:00
66646, 15/06/2007 12:20, 6:17:00
66646, 15/06/2007 15:08, 2:43:00
67844, 14/06/2007 04:39,
67844, 14/06/2007 09:05, 4:26:00
67844, 14/06/2007 09:08, 0:03:00
67844, 14/06/2007 16:27, 4:09:00
If ID is equal to the ID in record above then TimeDiff is equal to reg minus reg in the above recored, else blank.
Hope someone can help me with this.
Thanks, GS
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Jul 29, 2014
I'm trying to work out the difference between 2 records both of which have a call out date [bas start date]..basically the structure is
equipment number call number bas start date
12345678 112255 1/7/14
12345678 112256 3/7/14
What i'm after is the 4th column to work out the date diff... in this case 2 days the equipment can be multiple times so i might see equipment number 12345678 - upto 10 times with consecutive dates - all of which i need to know the difference between the current call date and the previous call date..
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Nov 5, 2006
I have created a database in Access where parents of students may come in and volunteer and receive free time credit from their employer (those companies who participate).
The database runs fine: Main table (demographics; student table; signIn/signOut table; and Volunteer Duty (a combo box that list all of the approved volunteer duties to qualify for the time credit) Every thing works perfect with the exception of my signIn/signOut form. After struggling with this for countless hours, I have settled for a manual entry of the signIn and signOut time, entered at the time of their start/stop times. I would like for it to be an automated function, but I have had such a difficult time up to this point I will settle for this method. What I NEED is to figure out how to make my "total vol hours today" field calculate the total volunteer hours at the time the parent "signOut".
If some of you Access MVP's can help with this I will be very grateful.
I awaite your answers, and THANKS IN ADVANCE.
signed: "head spinning like-a-top"
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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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Aug 12, 2015
I have a query that must calculate the different between values in two different records, based on the date.
The underlying ORIGVALUES table contains:
Date; Value; Diff
1/10/15; 100; (this is what I am trying to calc)
1/11/15; 101; (this is what I am trying to calc)
1/14/15; 102; (this is what I am trying to calc)
What is the best way to have each record calculate the selected date value divided by the prior date value)? E.g.
For 1/11 the math is 101 / 100 (so the 1/11/15 record would show the result of 1.01)
For 1/14 the math is 102 / 101 (1/11 to 1/14 represents a weekend)
I could copy the prior day values to the current day records and do that math easily but that is very redundant.
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Sep 6, 2006
I finally got the team's database running but one problem. The database is on the network drive an when more then one member try to use the database, they get an error "database is in use". Is there a way so more then one person can use the database at a time. And this may seem like alot but is there a way to just give viewing access to some people so they edit nothing?
THANKING YOU IN ADVANCE!
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Sep 7, 2006
Ok its been a long while since I've set up a date base in access. I run a repair shop and I've set up tables for customers, machines and employees. My issue is when I create my form to enter repairs for each customer the information like address, name, phone number, model.... do seem to be following over to my forms; I'm having to key the information manually each time instead of entering the customer # and having the rest of the customer information populate the additional fields.
Anyone who can help me with this I'll greatly appreciate it, I'm losing sleep over this one.
Thanks in advance for the help.
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Jun 23, 2014
I am starting to create a resourcing database that needs to be able to work with dates and times and perform calculations on them.
I need to work out the number of hours. I have two date/time fields Day_Start_Time and Day_End_Time. I want to calculate the difference between the two in hours and then multiply by the number of working days.
I tried this: Number_Of_Hours: DateDiff("hh",[Day_Start_Time],[Day_End_Time])*[Number_of_days]
But get #Func! when I run the query.
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Jan 18, 2006
I have a Transactoin Table that holds the following fields:
TransID (*Primary Key Numerical Value)
OrderID (Non Unique Number Value, One Order can have multiple Transactions attributed to it.
Status (Numerical Value ranging from 0 to 32, each is a different phase in the life of a transaction such as 0 means Transation Created, 1 through 31 are various actions with 32 beign the transaction closing)
Date (The date in which a particular phase of a particular transaction happened.)
Reason (The Description of a phase. This is the only text field whose contents are relative to the Status field in the same table.)
I need to find the amount of time passed from the first Transaction to the last transaction of each individual order, which will be displayed in a report. Unfortunately not every order goes through all 32 phases, in fact most dont. The individual orders have a random amount of phases that they go through but each have a starting one (which ranges from 0 onwards) and an ending one (once again it is not necessarily 32). The dates correspond to the numbers in an individual order which means that if an order has the following phases:
1
2
4
6
Then the dates of each phase will be one after the other like the Status Number as shown above. Anybody knows how to do this? I need to find how much time passed from the first transaction to the last for each individual order qand display it in a report.
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Jan 6, 2007
I have a table, and in the table I have an assesment date and date of receipt. I would like to have a field in this table which shows the difference between these 2 dates (in days). If this is possible?
Can anyone help me on this matter, I am pulling my hair out. Its most probably very simple for you mega experts.
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Nov 2, 2006
Hi.
I have one table with dates (1) and object properties. Another table has dates (2) and other info. What I need is a query that selects the dates (1) closest to date (2) and lists the respective properties.
I figured all I needed to do is a WHERE MIN (dates(2)-dates(1)) query. The problem is that Access (2000) rejects this query b/c aggregate functions are not allowed in WHERE statements.
Does anyone have an idea of how to work around this? The structure of the data is such that there will only be one minimum date > 0.
Looking forward to your ideas. THANKS !!
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Aug 31, 2006
Hello to everybody.
I have a problem in calculating the difference between two dates and displaying the output into Years Months Weeks Days. My problem is that dividing the number of days by 30 and requesting an integer is not accurate enough. I have looked at Pat and Jons examples shown in these threads
http://www.access-programmers.co.uk/forums/showthread.php?t=67472
http://www.access-programmers.co.uk/forums/showthread.php?t=89051&highlight=calculating+number+months
which either method would suit me as the accurate answer is what I am after.
My problem is that not all of my records would have a start and end date. Therefore both examples would result in an error.
Can anyone please give a hint on how to perform the calculations on those fields which have dates recording the results but ignoring those fileds which do not have a start / end date.
I am having a bad day and I'm sure the answer is so easy that I am going to kick myself but having played around with the modules by limited knowledge is not enough.
Many thanks in advance
Ian
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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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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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