1. JDBC connects to DB through Driver

2. When we use a Driver, we need to do 3 things:

a) Load driver class;

b) Create instance of it;

c) Register it into DriverManager.

But in real life, it's very luck that we can realize these in ONE step:

Class.forName("Your.Driver.Class");

3. Then we can use conn=DriverManager.getConnection("DB.URL")

to get "connection" belong to the Driver.

4. Next, Statement = conn.createStatement(SQLofTableX);

SO, diff. driver has diff. conn; diff. conn has diff. statement; diff. SQL for diff. table. Every thing is unique.

As i think only a single driver is needed to load for a single database. If we load more than one driver for a single database it is difficult to distinguish them

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