Sorry, yes banking!
select headquarters from company where main_industry = 'Banking'
Thank you! Can you now tell me the all the headquarters of a company in Oil and gas?
select headquarters from company where main_industry = 'Oil and gas'
Great, what about all the headquarters with both a company in oil and gas and a company in banking?
select headquarters from company where main_industry = 'Banking' intersect select headquarters from company where main_industry = 'Oil and gas'