CREATE TABLE company (Headquarters VARCHAR2, Industry VARCHAR2)

Show the headquarters that have both companies in banking industry and companies in oil and gas industry.
SELECT Headquarters FROM company WHERE Industry = "Banking" INTERSECT SELECT Headquarters FROM company WHERE Industry = "Oil and gas"
SELECT "Headquarters" FROM "company" WHERE "Banking" = "Industry" INTERSECT SELECT "Headquarters" FROM "company" WHERE "Industry" = "Oil and gas"