  Infinitely many Casoratian identities are derived for the Wilson and
Askey-Wilson polynomials in parallel to the Wronskian identities for the
Hermite, Laguerre and Jacobi polynomials, which were reported recently by the
present authors. These identities form the basis of the equivalence between
eigenstate adding and deleting Darboux transformations for solvable (discrete)
quantum mechanical systems. Similar identities hold for various reduced form
polynomials of the Wilson and Askey-Wilson polynomials, e.g. the continuous
q-Jacobi, continuous (dual) (q-)Hahn, Meixner-Pollaczek, Al-Salam-Chihara,
continuous (big) q-Hermite, etc.
