Initial commit
Added 3 tables
Added extra credit exercise
Completed Exercise 3
Inserted some values into the database
Renamed the exercise 2 to twotables.sql
Deleted 2 files permanently
completed exercise 3
Completed exercise 4 - added person pet relationship
Completed exercise 5 - used the SELECT command
Merge branch 'master' of https://github.com/tzhenghao/LearnSQLTheHardWay
Updated README