CREATE TABLE phone (name CLOB, phone_id NUMBER, memory_in_g NUMBER, carrier CLOB, price NUMBER)
CREATE TABLE phone_market (market_id NUMBER, phone_id CLOB, num_of_stock NUMBER)
CREATE TABLE market (market_id NUMBER, district CLOB, num_of_employees NUMBER, num_of_shops NUMBER, ranking NUMBER)

Show the carriers that have both phones with memory smaller than 32 and phones with memory bigger than 64.
SELECT carrier FROM phone WHERE memory_in_g < 32 INTERSECT SELECT carrier FROM phone WHERE memory_in_g > 64
SELECT "carrier" FROM "phone" WHERE "memory_in_g" < 32 INTERSECT SELECT "carrier" FROM "phone" WHERE "memory_in_g" > 64