CREATE TABLE station_company (station_id NUMBER, company_id NUMBER, rank_of_the_year NUMBER)
CREATE TABLE gas_station (station_id NUMBER, open_year NUMBER, location CLOB, manager_name CLOB, vice_manager_name CLOB, representative_name CLOB)
CREATE TABLE company (company_id NUMBER, rank NUMBER, company CLOB, headquarters CLOB, main_industry CLOB, sales_billion NUMBER, profits_billion NUMBER, assets_billion NUMBER, market_value NUMBER)

What are the headquarters with at least two companies in the banking industry?
SELECT headquarters FROM company WHERE main_industry = 'Banking' GROUP BY headquarters HAVING COUNT(*) >= 2
SELECT "headquarters" FROM "company" WHERE "main_industry" = 'Banking' GROUP BY "headquarters" HAVING COUNT(*) >= 2