Исправление qaqa, 16.06.19 07:34 (текущая версия) :
А так?
where (Field1 = a1 AND Field2 = b1 AND Field3 = c1) or (Field1 = a2 AND Field2 = b2 AND Field3 = c2)
Исходная версия qaqa, 16.06.19 07:32:
(Field1 = a1 AND Field2 = b1 AND Field3 = c1) or (...)