CREATE TABLE employment (Company_ID NUMBER, People_ID NUMBER, Year_working NUMBER)
CREATE TABLE people (People_ID NUMBER, Age NUMBER, Name CLOB, Nationality CLOB, Graduation_College CLOB)
CREATE TABLE company (Company_ID FLOAT, Name CLOB, Headquarters CLOB, Industry CLOB, Sales_in_Billion FLOAT, Profits_in_Billion FLOAT, Assets_in_Billion FLOAT, Market_Value_in_Billion FLOAT)

Stack bar chart of the number of headquarters vs Industry based on headquarters, show by the names in desc.
SELECT Headquarters, COUNT(Headquarters) FROM company GROUP BY Industry, Headquarters ORDER BY Headquarters DESC
SELECT "Headquarters", COUNT("Headquarters") FROM "company" GROUP BY "Industry", "Headquarters" ORDER BY "Headquarters" DESC