CREATE TABLE cinema (Cinema_ID INT, Name TEXT, Openning_year INT, Capacity INT, Location TEXT)
CREATE TABLE schedule (Cinema_ID INT, Film_ID INT, Date TEXT, Show_times_per_day INT, Price FLOAT)
CREATE TABLE film (Film_ID INT, Rank_in_series INT, Number_in_season INT, Title TEXT, Directed_by TEXT, Original_air_date TEXT, Production_code TEXT)

Bar graph to show the number of directed by from different directed by, show Y from high to low order.
SELECT Directed_by, COUNT(Directed_by) FROM film GROUP BY Directed_by ORDER BY COUNT(Directed_by) DESC
SELECT "Directed_by", COUNT("Directed_by") FROM "film" GROUP BY "Directed_by" ORDER BY COUNT("Directed_by") DESC NULLS LAST