Hi. In SQL "null == any value" resolves to false, so optimizer can safely skip nulls from either side if any for the inner join.
Best regards, Vitalii Tymchyshyn NULL is still a value that may be paired with a NULL in a.a > > The only optimization I could see is if the a.a column has NOT NULL > defined while b.b does not have NOT NULL defined. > > Not sure if it is all that common. Curious what if you put b.b IS NOT NULL > in the WHERE statement? > > ----------------- > Phillip Couto > > > > >
