CREATE TABLE people (People_ID NUMBER, Age NUMBER, Name CLOB, Nationality CLOB, Graduation_College CLOB)
CREATE TABLE employment (Company_ID NUMBER, People_ID NUMBER, Year_working NUMBER)
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)

What is the number of companies for each headquarter? Visualize by bar chart, show from low to high by the bar.
SELECT Headquarters, COUNT(Headquarters) FROM company GROUP BY Headquarters ORDER BY Headquarters
SELECT "Headquarters", COUNT("Headquarters") FROM "company" GROUP BY "Headquarters" ORDER BY "Headquarters"