CREATE TABLE users
(`user_name` varchar(25), `age` smallint, `previous_level` varchar(20), `current_level` varchar(20))
;
INSERT INTO users (user_name, age, previous_level, current_level)
VALUES
('User1', 25, 'N/A', 'blue'),
('User2', 30, 'blue', 'bronze'),
('User3', 28, 'bronze', 'silver'),
('User4', 35, 'silver', 'gold'),
('User5', 22, 'gold', 'diamond'),
('User6', 27, 'N/A', 'blue'),
('User7', 33, 'blue', 'bronze'),
('User8', 29, 'bronze', 'silver'),
('User9', 26, 'silver', 'gold'),
('User10', 31, 'gold', 'diamond'),
('User11', 24, 'N/A', 'blue'),
('User12', 32, 'blue', 'bronze'),
('User13', 34, 'bronze', 'silver'),
('User14', 23, 'silver', 'gold'),
('User15', 36, 'gold', 'diamond'),
('User16', 29, 'N/A', 'blue'),
('User17', 27, 'blue', 'bronze'),
('User18', 30, 'bronze', 'silver'),
('User19', 26, 'silver', 'gold'),
('User20', 25, 'gold', 'diamond');
Select * from users;