Comparing DateTime Ranges - SQL Server Forums

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Comparing DateTime Ranges

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AskSQLTeam
Ask SQLTeam Question

0 Posts

Posted - 2006-08-09 : 09:35:00

Jack writes "I have a startDate and endDate in my database. I want to determine if a supplied range (requestedStart and requestedEnd) conflicts.

If I have startDate = 1/1/2006 08:00 AM and endDate = 1/1/2006 05:00 PM in the database how do I test if 1/1/2006 7:00 AM and 1/1/2006 06:00PM conflict?

Thanks."

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2006-08-09 : 09:52:48

Where yourDate not between StartDate and EndDate

Madhivanan

Failing to plan is Planning to fail

mwjdavidson
Aged Yak Warrior

735 Posts

Posted - 2006-08-09 : 09:53:40

If you're looking for any overlap, this should do it:

SELECT mt.startDate, mt.endDate
FROM   MyTable AS mt
WHERE  @requestedEnd Between mt.startDate AND mt.endDate OR @requestedStart Between mt.startDate AND mt.endDate

Mark

airjrdn
Starting Member

35 Posts

Posted - 2006-08-09 : 09:56:00

declare @requestedStart datetime,
@requestedEnd datetime

select @requestedStart = convert(datetime, '1/1/2006 7:00 AM'),
@requestedEnd = convert(datetime, '1/1/2006 6:00 AM')

if datediff(s, @requestedStart, @requestedEnd) < 0
select 'conflict'
else
select 'ok'

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