Comparing date times start time and end time using between

I cant seem to get the right combination to generate the proper results.  I need to compare the start date and end date to determine if rows are overlaping.  Example

RowID        StartTime                           EndTime
1                9/11/2010  08:00:00         9/11/2010  09:00:00
2                9/11/2010  07:30:00         9/11/2010  08:30:00
3                9/11/2010  08:30:00         9/11/2010  09:30:00
4                9/11/2010  09:30:00         9/11/2010  10:30:00

I need to return row 1,2 and 3 but not row 4 since the start time is the same as the end time of the previous appointment. Any help is greatly appreciated.
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mehdi_javanConnect With a Mentor Commented:
I think you need this:

Select t1.* 
from YourTable t1
where exists (select null from YourTable t2
              where (t1.StartTime > t2.StartTime and t1.StartTime < t2.EndTime)
              or (t1.EndTime > t2.StartTime and t1.EndTime < t2.EndTime)
              or (t1.StartTime < t2.StartTime and t1.EndTime > t2.EndTime)

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dsackerContract ERP Admin/ConsultantCommented:
Try this:
select RowID,
from   MyTable
where  StartTime NOT IN (select EndTime from MyTable)

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Guy Hengel [angelIII / a3]Billing EngineerCommented:
what about this:
select t.*
 from yourtable t
 where exists( select null from yourtable o where o.starttime < t.endtime and o.endtime > t.starttime )

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clintnashAuthor Commented:
Short of a missing ) at the end, this query returns the correct results. Thanks to each of your for your help this morning.
Guy Hengel [angelIII / a3]Billing EngineerCommented:
did you try mine? did it not work?
clintnashAuthor Commented:
Angel, Actually I tried them all, the first returned two of the three rows, yours returned all four rows.  Thank you...
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