Please can you help me describe the transition between these two sets of notes in theoretical terms:
(For clarity, on the guitar: open D string, g string 2nd fret, b string 3rd fret, e string 5th fret)
(Guitar: d string 2nd fret, open g string, open b string, e string 3rd fret)
DADA isn't a chord as only two notes but could be described with as an interval: a perfect fifth (D to A). EGBG could be described as an Em chord (EGB) but that's missing the important high G note.
How do I describe these two sets of notes and transition between them? Does playing these two chords in different orders change the key? (Minor v Major)