How many companies have an industry of banking?
select count ( * ) from companies where industry = "Banking"
How many don't have a banking industry?
select count ( * ) from companies where industry ! = "Banking"
What are the total sales of those companies?
select sum ( sales_billion ) from companies where industry ! = "Banking"
What is the maximum sales of those companies?
select max ( sales_billion ) from companies where industry ! = "Banking"
What is the minimum sales?
select min ( sales_billion ) from companies where industry ! = "Banking"