¿Has probado?
INSERT INTO Table_A (nid, vid, type, title, uid)
SELECT '',
'',
'multichoice',
questiontext ,
'1'
from Table_B
Eche un vistazo a INSERT ... SELECT Sintaxis
¿Has probado?
INSERT INTO Table_A (nid, vid, type, title, uid)
SELECT '',
'',
'multichoice',
questiontext ,
'1'
from Table_B
Eche un vistazo a INSERT ... SELECT Sintaxis