Detect overlapping date ranges from the same table

Question

I have a table with the following data

PKey  Start       End         Type
====  =====       ===         ====
01    01/01/2010  14/01/2010  S
02    15/01/2010         


        

Answer 1

select A.*
from MyTable A
inner join MyTable B
on (B.start <= A.end)
and (B.end >= A.start)

or something like that (assuming dates are not nullable and equal dates count as an overlap).