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

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