CREATE TABLE Manufacturers (Code NUMBER, Name VARCHAR2, Headquarter VARCHAR2, Founder VARCHAR2, Revenue FLOAT)
CREATE TABLE Products (Code NUMBER, Name VARCHAR2, Price NUMBER, Manufacturer NUMBER)

Give me a bar chart to show the revenue of the company that earns the highest revenue in each headquarter city.
SELECT Headquarter, MAX(Revenue) FROM Manufacturers GROUP BY Headquarter
SELECT "Headquarter", MAX("Revenue") FROM "Manufacturers" GROUP BY "Headquarter"