CREATE TABLE party_host (Party_ID NUMBER, Host_ID NUMBER, Is_Main_in_Charge BOOLEAN)
CREATE TABLE host (Host_ID NUMBER, Name CLOB, Nationality CLOB, Age CLOB)
CREATE TABLE party (Party_ID NUMBER, Party_Theme CLOB, Location CLOB, First_year CLOB, Last_year CLOB, Number_of_hosts NUMBER)

Show different nationalities along with the number of hosts of each nationality Visualize by bar chart, and sort the total number from low to high order.
SELECT Nationality, COUNT(*) FROM host GROUP BY Nationality ORDER BY COUNT(*)
SELECT "Nationality", COUNT(*) FROM "host" GROUP BY "Nationality" ORDER BY COUNT(*)