CREATE TABLE View_Unit_Status (apt_id VARCHAR, available_yn VARCHAR)
CREATE TABLE Apartments (apt_number VARCHAR, apt_id VARCHAR)

Show the apartment numbers of apartments with unit status availability of both 0 and 1.
SELECT T1.apt_number FROM Apartments AS T1 JOIN View_Unit_Status AS T2 ON T1.apt_id = T2.apt_id WHERE T2.available_yn = 0 INTERSECT SELECT T1.apt_number FROM Apartments AS T1 JOIN View_Unit_Status AS T2 ON T1.apt_id = T2.apt_id WHERE T2.available_yn = 1
SELECT "T1"."apt_number" FROM "Apartments" AS "T1" JOIN "View_Unit_Status" AS "T2" ON "T1"."apt_id" = "T2"."apt_id" AND "T2"."available_yn" = 0 INTERSECT SELECT "T1"."apt_number" FROM "Apartments" AS "T1" JOIN "View_Unit_Status" AS "T2" ON "T1"."apt_id" = "T2"."apt_id" AND "T2"."available_yn" = 1