Introduction - If you have any usage issues, please Google them yourself
The " online VOD system" is just a sample of the database instance database application technology, focusing on some of the ways to build a database of familiar and which we conceptual model from the database to put theory into practice, designing a database to identify Draw relational schema ER diagram, and then use the SQL language to the database is established, then the input data, and finally completed using some relational operator expression expression and SELECT query statement.