CREATE TABLE table_name_20 (points VARCHAR2, year VARCHAR2, chassis VARCHAR2)

How many points are there for a Mclaren m23 chassis later than 1972?
SELECT COUNT(points) FROM table_name_20 WHERE year > 1972 AND chassis = "mclaren m23"
SELECT COUNT("points") FROM "table_name_20" WHERE "chassis" = "mclaren m23" AND "year" > 1972