IN predicate
The IN predicate compares a value to a set of values and can have one of two forms
expression [NOT] IN ( subselect )expression [NOT] IN ( value1, value2, .... )
ValueN can either be a literal value or an input parameter. The expression can not evaluate to a reference type.
e.salary IN ( 10000, 15000 )
is equivalent to
( e.salary = 10000 OR e.salary = 15000 )
e.salary IN ( select e1.salary from EmpBean e1 where e1.dept.deptno = 10)
is equivalent to
e.salary = ANY ( select e1.salary from EmpBean e1 where e1.dept.deptno = 10)
e.salary NOT IN ( select e1.salary from EmpBean e1 where e1.dept.deptno = 10)
is equivalent to
e.salary <> ALL ( select e1.salary from EmpBean e1 where e1.dept.deptno = 10)