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

For each headquarter, what are the headquarter and how many companies are centered there?
SELECT headquarters, COUNT(*) FROM company GROUP BY headquarters
SELECT "headquarters", COUNT(*) FROM "company" GROUP BY "headquarters"