Sample basic script to test that you have the same schema as the one we will use for testing.
After you have create the hw7 database and added the "users" and "likes" tables, 
download/copy the provided test_01.sql script and run it from your hw7 database:

$ psql hw7 
hw7=# \i test_01.sql


You should get the following output (ignoring any delete, create, drop , insert, etc statements):

 count 
-------
     6
(1 row)

    mtitle    
--------------
 Batman
 Casino
 Desperado
 Dracula
 Godfather
 GoldenEye
 Heat
 Philadelphia
 Popeye
 Rambo
 RoboCop
 Rocky
 Spaceballs
 Speed
 Stargate
 Terminator
 Underworld
(17 rows)