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

Can you show a bar chart to visualize the number of carriers?, and list x axis from high to low order.
SELECT Carrier, COUNT(Carrier) FROM phone GROUP BY Carrier ORDER BY Carrier DESC
SELECT "Carrier", COUNT("Carrier") FROM "phone" GROUP BY "Carrier" ORDER BY "Carrier" DESC NULLS LAST