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)
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)

Plot sum capacity over openning year in a line chart, and I want to rank by the x axis in ascending.
SELECT Openning_year, SUM(Capacity) FROM cinema ORDER BY Openning_year
SELECT "Openning_year", SUM("Capacity") FROM "cinema" ORDER BY "Openning_year" NULLS FIRST