Time From Datetime

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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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
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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.

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Hello -

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This screen shot may help:

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