CREATE TABLE market (Market_ID NUMBER, District CLOB, Num_of_employees NUMBER, Num_of_shops FLOAT, Ranking NUMBER)
CREATE TABLE phone_market (Market_ID NUMBER, Phone_ID CLOB, Num_of_stock NUMBER)
CREATE TABLE phone (Name CLOB, Phone_ID NUMBER, Memory_in_G NUMBER, Carrier CLOB, Price FLOAT)

Plot total number of memory in g by grouped by carrier as a bar graph
SELECT Carrier, SUM(Memory_in_G) FROM phone GROUP BY Carrier
SELECT "Carrier", SUM("Memory_in_G") FROM "phone" GROUP BY "Carrier"