Let's drop the existing cats table:
DROP TABLE cats;
Recreate a new cats table:
CREATE TABLE cats
(
cat_id INT NOT NULL AUTO_INCREMENT,
name VARCHAR(100),
breed VARCHAR(100),
age INT,
PRIMARY KEY (cat_id)
);
DESC cats;
And finally insert some new cats:
INSERT INTO cats(name, breed, age)
VALUES ('Ringo', 'Tabby', 4),
('Cindy', 'Maine Coon', 10),
('Dumbledore', 'Maine Coon', 11),
('Egg', 'Persian', 4),
('Misty', 'Tabby', 13),
('George Michael', 'Ragdoll', 9),
('Jackson', 'Sphynx', 7);