CREATE TABLE company (Company_ID NUMBER, Rank NUMBER, Company CLOB, Headquarters CLOB, Main_Industry CLOB, Sales_billion FLOAT, Profits_billion FLOAT, Assets_billion FLOAT, Market_Value FLOAT)
CREATE TABLE station_company (Station_ID NUMBER, Company_ID NUMBER, Rank_of_the_Year NUMBER)
CREATE TABLE gas_station (Station_ID NUMBER, Open_Year NUMBER, Location CLOB, Manager_Name CLOB, Vice_Manager_Name CLOB, Representative_Name CLOB)

Draw a bar chart of manager name versus how many manager name
SELECT Manager_Name, COUNT(Manager_Name) FROM gas_station GROUP BY Manager_Name
SELECT "Manager_Name", COUNT("Manager_Name") FROM "gas_station" GROUP BY "Manager_Name"