Start MySQL in Ubuntu
mysql -u root -p
Enter password:(Enter your password here!)
Commands
mysql> show databases;
Database:bookshop, mysql, test...
mysql> use bookshop;
Database changed
mysql> show tables;
Tables_in_bookshop:bookapp_books, bookapp_consumer, bookapp_shoppingcart...
mysql> select * from bookapp_books;
id name contents price url
225 lala lala 121 lala
mysql> delete from bookapp_books;
Query OK, 1 row affected <0.02 sec>
mysql> select * from bookapp_books;
Empty set