You 'can', but the dynamic SQL will perform better.
If :c1 is required, but :c2 and :c3 are optional, you can do this:
SELECT
----*
FROM
----T
WHERE
----T.C1----=----:C1----------------AND
----T.C2----=----NVL(:C2,T.C2)----AND
----T.C3----=----NVL(:C3,T.C3)
HTH,
- Chris




