Subtract TIME From DATETIME
Mar 7, 2008
I'm sure this is simple but my brain is mushy this morning!
I have two datetime fields ADMISSION and DISCHARGE with values such as 03/02/2008 15:00. How do I convert these to dates only? I don't want to just *format* them as dates, which I can do. In this example I would want to convert that date to 03/02/2008 (or 03/02/2008 00:00)
It's an idiosyncrasy of the way the NHS calculates hospital length of stay. Our previous IT system had dates and times in separate fields so I could just ignore the time field and work out length of stay based on dates only. However, our new system returns a combined datetime.
Patient A 03/02/2008 00:15 to 03/02/2008 23:45 = 0 days
but
Patient B 03/02/2008 23:45 to 04/02/2008 00:15 = 1 day
Basically, you count a day if there's a date change, even if that was only half an hour (or even a few minutes) either side of midnight, but you DON'T count a day if there was no date change, even if that was almost 24 hours.
So formatting them as dd/mm/yyyy wont work ,as I will still have partial days when I subtract one from the other and INT([DISCHARGE]-[ADMISSION]) wont always work either as it would calculate 0 for patient B.
Help!
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May 20, 2005
Hi! This is my first question here.
I want to make query where I want to show data only from time1 to time2 (for a month).
I want to make this in Access because I need Forms.
I made this on the SQL Server but I had to change the time limits in the code what I don't like. How to make this in Access SQL?
On the SQL server it looked like this:
SELECT * FROM TimeSample
WHERE TimeVal - CAST(FLOOR(CAST(TimeVal AS float)) AS datetime) > '10:00' AND
TimeVal - CAST(FLOOR(CAST(TimeVal AS float)) AS datetime) < '17:00'
Any ideas?
Thanks, Bob.
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Dec 3, 2013
I have a report that shows a datetime field and I would like to show only the time portion of the field on my report. Is there a way for me to do that?
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Jul 5, 2005
HI all,
I am still new in Access databases :o
I have a table with 'General Date' column. So I have to create query wich extracts records between Last record (via Date field) and 'for example' 10 days before. But Last record in Date column may differ from Now().
When this is done I have create calculations with extracted records using agregate functions.
I'm trying to use Last function for Criteria putting it into Date field and substracting with -10 (for 10 days) but it doesn't work.
Please help! :confused:
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Sep 12, 2013
I have some incorrect time entries in a column that I need to fix with an update query.
So, 04/11/2013 08:00:00 needs to be changed to 04/11/2013 09:00:00
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Oct 31, 2012
Any way of setting up a table containing the following date/time fields.
StartDate
StartTime
EndDate
EndTime
Ultimately I will need to be able to subtract these date/times to get a total time between the two. Should I combine the start date and times in one cell or keep them separate.
In either scenerio, how do I subtract the two in a query for a report?
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Nov 14, 2006
Hey Guys,
Having some trouble doing a couple of things using both Data Definition Language and a Right() Query.
What I am trying to do is convert this field:
August 17, 2006 3:56 PM
into this
15:56:00
Using this:
Right([Travel Date/Time To],InStr([Travel Date/Time To],",")-1)
Now because the time part in my first field can vary from being 3:56 PM to 12:56 PM Right() is only getting those where the time has two digits.
I tried to use DDL to convert my field to DATETIME but cannot convert two columns in one SQL statement.
Can anyone help me out with this? Sorry if the details are sketchy but I'm being kicked out of the office (after 5:00pm you see!).
Cheers.
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Apr 21, 2008
Is it possible to convert the text field that comes in this form:
:80421
to the following datetime format: MM/DD/YY 12:00:00AM
Please note that the text field contains a colon at the beginning. The number 8 represents a year (2008), the 04 represents a month (April) and the last two characters are days in the month (21). The converted field should look like:
04/21/08 12:00:00AM
Thank you.
Peter
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Apr 14, 2008
Hello -
I have a table that looks like this:
Code:ID Station DateTime Value 1 ABQ 10/8/2005 1:00 am 102 ABQ 10/8/2005 2:00 am 203 ABQ 10/8/2005 3:00 am 254 ABQ 10/8/2005 4:00 am 5...
I am trying to build a query that, for each record, gives me the values for the previous 2 hours.
So my goal would be a query that returns:
Code:ID Station DateTime Value ValueT-1 ValueT-21 ABQ 10/8/2005 1:00 am 10 Null Null2 ABQ 10/8/2005 2:00 am 20 10 Null3 ABQ 10/8/2005 3:00 am 25 20 104 ABQ 10/8/2005 4:00 am 5 25 20...
I created a table (NewTable) that, for each record, has the DateTime, DateTimeT-1, and DateTimeT-2. So columns in Newtable are ID, Station, DateTime, Value, DateTimeT-1, DateTimeT-2 where DateTimeT-1 = dateadd("h",-1,DateTime) and DateTimeT-2 = dateadd("h",-2,DateTime).
I then joined (using a left join) this new table to the original table on [NewTable].[DateTimeT-1] = [OldTable].[DateTimeT].
so code is
Code:select [NewTable].ID, [NewTable].Station, [NewTable].DateTime, [NewTable].Value, [OldTable].DateTime, [OldTable].Value AS ValueT-1from NewTable left join ON [NewTable].[DateTimeT-1] = [OldTable].[DateTimeT]
The output does not pull all the right records. Some of the records have Null values for ValueT-1 when the datetimeT-1 is in OldTable. So for some reason the join doesn't seem to be working.
Hopefully this is clear. Any thoughts? Help is very much appreciated!
Thank you!
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Oct 10, 2013
I have a form which has a text box with date and a text box with a time. DD/MM/YYYY AND HH:NN:SS
In vba I have declared A as a date and done the following
A=Format([Textbox1] & " " & [Textbox2],"dd/mm/yyyy hh:nn:ss AM/PM")
msgbox (A)
msgbox shows everything but the AM/PM
Now I need need to pass this date to excel to do a vlookup which works if I do the following
A=#03/05/2013 11:26:00 AM#
but it wont work if I grab the date and time from the access form, I think it is because the AM/PM is missing.
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May 6, 2015
I have a form that pulls in open project information that has a datetime field called "Duetime". What I'm attempting to do is that when this datetime field is less than 1 hour away, to turn the field background orange. Also, if less than 30 minutes to actually being past due, then it would be red.
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Aug 28, 2007
I'm losing my mind on this one. Here is my situation... I receive a daily excel sheet with these fields. I would like to import this workfile into access and would like to manipulate it anyway I want. The problem I'm coming into is that I can't collapse/group the datetime field into just the date when I run a query. I would like to be able to run a query on any date range the client registered, a query on any and all the unique dates the client purchased something, all the unique clients, etc. Here is a sample
Sales Name - Sales # - Client Name - Client # - Registered Dt - Purchased Dt
Paul, John - 273 - Kelly, Maria - 2252 - 7/26/2007 18:22 - 8/4/2007 10:21
Paul, John - 273 - Kelly, Maria - 2252 - 7/26/2007 18:22 - 8/5/2007 18:20
Paul, John - 273 - Kelly, Maria - 2252 - 7/26/2007 18:22 - 8/6/2007 10:21
Paul, John - 273 - Kelly, Maria - 2252 - 7/26/2007 18:22 - 8/6/2007 13:28
Paul, John - 273 - Kelly, Maria - 2252 - 7/26/2007 18:22 - 8/6/2007 13:28
Paul, John - 273 - Kelly, Maria - 2252 - 8/7/2007 01:22 - 8/9/2007 05:46
I would like it to show...
Sales Name - Sales # - Client Name - Client # - Registered Dt - Purchased Dt
Paul, John - 273 - Kelly, Maria - 2252 - 7/26/2007 - 8/4/2007
Paul, John - 273 - Kelly, Maria - 2252 - 7/26/2007 - 8/5/2007
Paul, John - 273 - Kelly, Maria - 2252 - 7/26/2007 - 8/6/2007
Paul, John - 273 - Kelly, Maria - 2252 - 8/7/2007 - 8/9/2007
and a different query like ( the purchase date doesn't matter here)...
Sales Name - Sales # - Client Name - Client # - Registered Dt - Purchased Dt
Paul, John - 273 - Kelly, Maria - 2252 - 7/26/2007 - 8/4/2007
Paul, John - 273 - Kelly, Maria - 2252 - 8/7/2007 - 8/9/2007
I read in other places to change the format, input mask, convert, char, etc. but nothing. Please tell me exactly what to do. I don't care if the time changes to midnight or 0:00:00. I will owe you my first born child.
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Nov 19, 2014
I am having an issue setting an instantiated forms' control. I am having RemDate ("Date") and RemTime ("Time") TextBox; so far the date textbox shows 1/1/1988 12:00 AM (the visible value is the time only) and the Time textbox doesn't show anything.
Code:
Set frm = New Form_ReminderAssigneesFrm
frm.RecordSource = "Select * from ReminderAssignees Where RemID = " & Parent.RemID
frm.RemID.DefaultValue = Parent.RemID
With SetRS(frm.RecordSource)
If Not .EOF Then
frm.RemDate.DefaultValue = FormatDateTime(.Fields("RemDate"), vbShortDate)
[Code] ....
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Jan 27, 2015
I have a field on a table that is a DateTime format and it needs to be that way. I am trying to query that table for all the dates to use in a combobox but I only wat the date not the time. The problem is when I format the field to just date I can't sort it anymore as a date and I can't group them. I still get multiple lines in my combobox because there multiple times for the same day. what is the proper way in a query to extract just the date from a field and still sort it as date ie 1/12/2015 is greater than 12/15/2014?
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Aug 6, 2015
I would like to add fields from one table to another based on matching datetime codes.
Most data are in the table 'metadata' (information on sound recordings), and i want to add lat long fields from a large table of GPS points 'gpsData'. Each record in the metadata table has start and end datetime fields - i want to a add lat and long that matches the start time and a lat and long that matches the end time (so four fields to metadata).
My approach has been to try this with two separate select queries (i.e. one for adding the start locations and one for adding the end locations), with the intention of then combining these two outputs in a single table.
When i try a simple select query though I can see that:
a) there are no matching time codes for some records, because although the hh:mm:ss look the same there are differences in the lesser decimal places of the datetime serial numbers. I have tried using the round function on the datetime fields of both tables but this doesn't fix it (I don't understand why not).
b) there are some duplicates because there are sometimes more than one GPS point for each second, and the metadata times are given to second precision (so some metadata records get two entries in the query result).
How can I have the query select the gpsData record with the nearest datetime stamp to that in the metadata table's start time field? The respective field names are UTC and StartUTC. Can i do the same for the end times simultaneously or should i do this separately?
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Aug 27, 2013
I have a larget transaction data set in access with Datetime column/filed.
I have been running pivot queries to excel to do analysis of the data but the datetime field is returning too many unique values for the pivot table to run.
What is the best way to reduce the datatime field to date only and where should this be done?
i.e. should I have a calculated field that trims datetime or should I set someohting up in Powerpivot?
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Dec 25, 2013
I am new to access 2010. I have a table called "Forecasts", and I wish to update the timestamp with todays date, whenever the user makes a change to the qty of goods forecasted.
I have been researching online for the solution to the correct format to datetime, but it doesnt seem to work.
Code:
Dim todayDate As Date
todayDate = Date
Dim sqlString As String
sqlString = "UPDATE [Forecasts] " & _
[Code] .....
The messagebox shows:
UPDATE [Forecast] SET Branch_Plant=123, Item_Number_Short='222', Description='AAA', UOM='EA', Estimated_Cost=123, Requesting_Business_Unit='AAA', End_Customer='CCC', Project ='Secret', Timestamp=#26/12/2013# WHERE ID =24
Then I hit a syntax error. Whats wrong with sqlString?
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Aug 16, 2007
Hi
I want to make a button which when clicked will bring up a box which the user will enter a number which will then be subtracted from a number in a field.
I have tried an update query however not been able to getting it working.
Any ideas?
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May 20, 2006
Hi,
I have a query with two fields. One has the "MEASUREMENT" and the second one is the month containing the values. In the MEASUREMENTs I have gross revenues and discounts, how can I create a new MEASUREMENT (net revenue) that is calculated by subtracting the discounts from the gross revenue.
Regards
Giannis
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Aug 11, 2006
Hi, I hope someone can help me out with this problem:
I have 2 tables with identical stucture, and no unique ID number.
Both had identical data, and the databse was then copied onto 2 laptops. Now further data was added onto each.
I want to now merge the three databses (ie original one, and 2 laptops) into 1, without creating duplicates- so I need to identify which are the new fields added to the databases. I figured that by somehow subtracting the original table from the new ones, i would be left with the new data, but dont know how to do this. Or is their another way?
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Feb 16, 2007
:confused: Need help building a query that will subtract the previous value from the next value at each change in date
Date Tier 1
1/6/2006 4.22
1/13/2006 4.27
1/20/2006 4.27
1/27/2006 4.314
2/3/2006 4.314
for example, 4.22-4.27 = -0.05
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Jul 30, 2007
If there is such an animal...
My employer uses a third party employee tracking system and I do back end work to massage the raw data for ad hoc reports using tables created by this third party software.
Is there a simple means to have a query compare Table A and Table B where Table A is a list of all jobs in a company - both filled and vacant - and Table B is a list of all employees in the company? The table containing jobs data has no field designating whether a job is filled or not. The only way to determine vacancies is to compare the two tables and select only those job numbers where there is no matching employee.
So, using examples from an earlier question - one that KeithG answered perfectly - let me see if I can demonstrate what I'm trying to do...
The Jobs table has two fields; JobNum and JobDesc.
The Employee table has three fields; EmpNum, EmpName, JobNum.
Here's Table A, Jobs;
100, Boss
105, Aide
200, Manager
201, Worker
202, Worker
Here's Table B, Employees;
111, Montgomery Burns, 100
112, Waylon Smithers, 105
121, Homer Simpson, 201
122, Lenny Leonard, 202
Jobnum is the link between the two tables in the query and the query's fields are;
JobNum and JobDesc
The result I need is;
200, Manager
The only vacant job.
So, how do I do a subtract query, if that's even a proper term? How do I have a result that is all of Table A that does not have a match in Table B?
Thanx!
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Jan 14, 2008
I have a report based on a query where I get results sorted by month after i have chosen 'from date' and 'to date' in the beginning. I also want a set number for each month to be subtracted from the total sum, and then added to the next month (even if it is a negative number). Ex. Total in january is 100, then it is supposed to subtract 50 from that number, report the result of 50 in one own field at the end of january, then send this to february where the total sum is ex. 200, then the total sum for february is supposed to be 250, and then again a different number, like 60 is automaticly subtracted from the total sum and displayed in one field as the result 190. And so on.. Does anyone know if this is possible, and how? I am a noob, both in access and in the english language :P
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Mar 12, 2007
(hard being a rookie)
On my Form, I want to have a query look at one specific field for a number (1). If the number is found then I would like to have the query do basic subtraction on two other fields. (one from each table)
What I have so far is one unbound text box with the following,
=IIf(tblDaStrategy!DaNumber=1,(tblDaStrategy!DaTar get-tblDaReport!DaActual1))
Simply put, if one field has the number one in it, then take the other two fields and subtract (ex. 100-75) to display 25.
It's not working. I keep getting the #Name?
Update: I think I got it. I went back to square one and made a master query that contains the data from both tables. Then I bound one of the forms to the query. I updated my IIF statement and poof. It seems to be working. Now, where's the Asprin and my pillow?
Update 2: Bummer, now my magical 25 is in place but now my form is locked tight. Guess I need to consider abandoning this concept and simply producing a report with the 25 on it. Unless someone out there has a better idea.
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Apr 19, 2007
4/11/2007 1:01:28 AM
4/12/2007 2:02:52 AM
4/13/2007 4:21:30 AM
4/14/2007 2:22:21 AM
4/15/2007 3:34:53 AM
4/16/2007 4:02:37 AM
4/17/2007 5:03:15 AM
4/18/2007 7:17:34 AM
I need helps again
How can I subtract 7 hour from the query
Thanks
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Oct 31, 2007
Hi,
Working on a query, what I have is a user will select a date on a form and hit submit.
I need the query that it runs, to pull all data -1 day from what they select.
So if they select 10/31 on the form, it needs to pull everything for 10/30 only.
I have this in my query now,
[Forms]![frm_change_report]![txt_Date]
Which pulls the data for the date they selected, but not sure how to subtract a day.
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