CREATE TABLE branch (membership_amount INT, open_year VARCHAR, city VARCHAR)

Show minimum and maximum amount of memberships for all branches opened in 2011 or located at city London.
SELECT MIN(membership_amount), MAX(membership_amount) FROM branch WHERE open_year = 2011 OR city = 'London'
SELECT MIN("membership_amount"), MAX("membership_amount") FROM "branch" WHERE "city" = 'London' OR "open_year" = 2011