What are the names of the companies in the banking or retail industries?
select name from company where industry = "Banking" or industry = "Retailing"
What are the total sales in billions of all of these companies combined?
select sum ( sales_in_billion ) from company where industry = "Banking" or industry = "Retailing"
and what is their total market value in billions?
select sum ( market_value_in_billion ) from company where industry = "Banking" or industry = "Retailing"