Also D Major (Ionian), E Dorian
A Mixolydian: A B C# D E F# G. Formula 1 2 3 4 5 6 ♭7. Same notes as D Major (Ionian), E Dorian, F# Phrygian. A major mode with a flat 7th: the sound of the dominant chord, of blues-rock riffs and of much folk and Celtic music.