Comments on: SQL How to split out the Time from a DateTime col then use that in a WHERE Clause http://itknowledgeexchange.techtarget.com/itanswers/sql-how-to-split-out-the-time-from-a-datetime-col-then-use-that-in-a-where-clause/ Thu, 20 Jun 2013 01:19:26 +0000 hourly 1 By: walrum http://itknowledgeexchange.techtarget.com/itanswers/sql-how-to-split-out-the-time-from-a-datetime-col-then-use-that-in-a-where-clause/#comment-101969 walrum Tue, 24 Jan 2012 00:33:56 +0000 #comment-101969 I believe that SELECT DATEPART(HH, GETDATE()) the best answer.

in other words following your sample:

WHERE DATEPART(HH, StartTime )>= ‘15′ AND DATEPART(HH, EndTime) <= ‘16′

]]> By: tomliotta http://itknowledgeexchange.techtarget.com/itanswers/sql-how-to-split-out-the-time-from-a-datetime-col-then-use-that-in-a-where-clause/#comment-101262 tomliotta Thu, 05 Jan 2012 02:06:48 +0000 #comment-101262 WHERE StartTime >= ‘15:00:00′ AND EndTime <= ‘16:00:00′

If those are DateTime data types, can’t you do this?

WHERE CONVERT(time(0),StartTime) >= ‘15:00:00′ AND CONVERT(time(0),EndTime) <= ‘16:00:00′

Or am I misunderstanding?

Tom

]]> By: darraca http://itknowledgeexchange.techtarget.com/itanswers/sql-how-to-split-out-the-time-from-a-datetime-col-then-use-that-in-a-where-clause/#comment-101245 darraca Wed, 04 Jan 2012 15:43:05 +0000 #comment-101245 Hi, sorry I’ve managed to sort this now.

The reason I needed the time splitting out was because I was working on an assignment to create a room booking project in vb.net. The database is stored in SQL Server and I had to use a table called Bookings which had the following 3 columns:
BookDate
StartTime
EndTime

I wanted to create a query that brought back any rooms that had been booked for a date contained in the BookDate column that fell between the time that is stored between the StartTime and EndTime columns. This is the reason why I was only interested in the Time part of the StartTime and EndTime columns.

I sorted this out by making sure that the date in the StartTime and EndTime columns was 1 Jan 1900, followed by the time. That way I could write the query as something similar to the following:

StartTime EndTime
1900-01-01 15:30:00 1900-01-01 16:00:00

WHERE StartTime >= ’15:00:00′ AND EndTime <= ’16:00:00′

Thanks anyway :)

]]> By: carlosdl http://itknowledgeexchange.techtarget.com/itanswers/sql-how-to-split-out-the-time-from-a-datetime-col-then-use-that-in-a-where-clause/#comment-101239 carlosdl Wed, 04 Jan 2012 14:15:20 +0000 #comment-101239 I’m not sure to understand why you need to split the time to use it in the WHERE clause.

Maybe these functions can help you: DATENAME, DATEPART.

It would be a good idea posting some example data, with the corresponding expected results.

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