CREATE TABLE Apartments (apt_number VARCHAR, apt_id VARCHAR)
CREATE TABLE Apartment_Bookings (apt_id VARCHAR, booking_status_code VARCHAR)

Show the distinct apartment numbers of the apartments that have bookings with status code 'Confirmed'.
SELECT DISTINCT T2.apt_number FROM Apartment_Bookings AS T1 JOIN Apartments AS T2 ON T1.apt_id = T2.apt_id WHERE T1.booking_status_code = "Confirmed"
SELECT DISTINCT "T2"."apt_number" FROM "Apartment_Bookings" AS "T1" JOIN "Apartments" AS "T2" ON "T1"."apt_id" = "T2"."apt_id" WHERE "Confirmed" = "T1"."booking_status_code"