T-SQL supports all your common comparison operators, e.g.
=
<
>
!= or <>
Comparisons involving two rows might imply the comparison would take place in a WHERE-clause. If you provide table definitions (CREATE TABLE statements), some test data (INSERT INTO statements) and a better idea of what you're trying to do I'd be happy to further help you.
There are no special teachers of virtue, because virtue is taught by the whole community.
--Plato