It's best that you learn this song in the original key, which is C, but I'll give it to u in Db cuz u asked:
"Let It Rain" by: Paul Morton
Key Db LH/RH
CD version:
Db / Ab-Db-F Open the flood gates of
Ab / Eb-Ab-C Heaven,
F / C-F-Ab let
Ab / F-Ab-C it
Bb / F-Bb-Db rain,
Bb / Bb-Db-F let
Ab / Ab-C-Eb it
Gb / Gb-Bb-Db rain.
Both hands: Ab, Bb, Db, Eb
(repeat multiple times)
My version:
Db / Ab-Db-F Open the flood gates of
Ab / Eb-Ab-C Heaven,
C / Bb-Eb-Gb let
F / A-Db-Eb-Ab it
Bb / Bb-Db-F rain,
Bb / Bb-Db-F let
Ab / Ab-C-Eb it
Gb / Gb-Bb-Db rain.
Both hands: Ab, Bb, Db, Eb
(repeat multiple times)
Run down:
Db / Ab-Db-F Open
C / Ab-C-Eb the
Bb / F-Bb-Db flood-
Ab / Eb-Ab-C gates
Gb / Db-Gb-Bb of
F / C-F-Ab
Eb / Bb-Eb-Gb Hea-
Db / Ab-Db-F
Ab / C-Eb-Ab ven,
(go to "let it rain)