Root on A string
no fifthx5454x
D7♭9 is the D dominant 7 flat 9 chord. Its notes are D, F♯, A, C and E♭. A compact four-finger grip without the fifth. Try it as V in a minor key.
x5454x
Numbers show frets from the low E string to the high e string; x means don't play that string.
Every D, F♯, A, C and E♭ on the first 12 frets. The filled dots are the root, D. Build your own shape from any nearby group.
Other D chords
Other dominant 7 flat 9 chords