CREATE TABLE school_bus (school_id NUMBER, driver_id NUMBER, years_working NUMBER, if_full_time others)
CREATE TABLE school (school_id NUMBER, grade CLOB, school CLOB, location CLOB, type CLOB)
CREATE TABLE driver (driver_id NUMBER, name CLOB, party CLOB, home_city CLOB, age NUMBER)

Show the types of schools that have two schools.
SELECT type FROM school GROUP BY type HAVING COUNT(*) = 2
SELECT "type" FROM "school" GROUP BY "type" HAVING COUNT(*) = 2