Querying the start time in exclusive form with the > operator indicates that a value should not be returned for the query start time if one does not exist. Querying the start time in inclusive form with the >= operator indicates that an initial value should be returned.
For example, the following exclusive query statement does not return an initial value for 2009-01-01 02:00:00:
DateTime > '2009-01-01 02:00:00'
However, the following inclusive query statement does return an initial value for 2009-01-01 02:00:00:
DateTime >= '2009-01-01 02:00:00'
No special final value is returned.