Db7-9 (Db7b9) altered chord

Altered Db chord for piano presented by keyboard diagrams.
Explanation: The Db7-9 alter the Db9 by the change of one note. The chord name can also be written as Db7b9 or Db7(b9).
Theory: The Db7-9 are identical with the Db9 except that the major ninth is flattenedThe tone is one half step lower.