Create View V1 as
Select ΚΩΔΒΙΒΛΙΟΥ, count(ΚΩΔΔΑΝ)as PLHTHOS1
From ΔΑΝΕΙΣΜΟΙ
Group by ΚΩΔΑΝΑΓ
Create View V2 as
Select ΚΩΔΒΙΒΛΙΟΥ, ΤΙΤΛΟΣ, count(ΚΩΔΔΑΝ)as PLHTHOS2
Order by ΚΩΔΒΙΒΛΙΟΥ desc