#### NULL and NOT NULL Code

Try inserting a cat without an age:

`INSERT INTO cats(name) VALUES('Alabama');`

`SELECT * FROM cats;`

Try inserting a nameless and ageless cat:

`INSERT INTO cats() VALUES();`

Define a new cats2 table with NOT NULL constraints:

    CREATE TABLE cats2
      (
        name VARCHAR(100) NOT NULL,
        age INT NOT NULL
      );

`DESC cats2;`

Now try inserting an ageless cat:

`INSERT INTO cats2(name) VALUES('Texas');`

View the new warnings:

`SHOW WARNINGS;`

`SELECT * FROM cats2;`

Do the same for a nameless cat:

`INSERT INTO cats2(age) VALUES(7);`

`SHOW WARNINGS;`