JDBC means java data base connectivity. JDBC is a Java API for executing SQL statements. JDBC provides a standard API for tool/database developers and makes it possible to interact with database using a pure Java API.
Using JDBC, it is easy to send SQL statements to virtually any relational database. In other words, with the JDBC API, it isn't necessary to write one program to access a Sybase database, another program to access an Oracle database, another program to access an Informix database, and so on. One can write a single program using the JDBC API, and the program will be able to send SQL statements to the appropriate database.
What Does JDBC Do?
1. establish a connection with a database
2. send SQL statements
3. process the results.