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Date comparison with Null

Last Modified: 2012-08-17
I have a query wherin I do a date comparison with another date.
This works fine except in cases where the date is NULL (when there is no

For eg:

Select * from Employee where status ='Present' and emp_id=10 and date > 
( select max(date) from Employee where emp_id=10 and status not in ('Work from home','On Site') )

This works great when the inner query returns a value .But when its NULL I get an empty set in the whole query as well .
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