Calculating SignIn/SignOut Time Difference

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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Calculating The Difference Between 2 'Time' Values

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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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.

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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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http://www.tdh1987.co.uk/pics/query.JPG

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