12.1. JDBC 2.0 and 3.0
JDBC (Java Database Connectivity ) is a Java API for accessing relational database systems. Prominent examples of relational database management system (RDBMS) products include Oracle, IBM DB2, Microsoft SQL Server, Sybase or Interbase, as well as open-source RDBMS solutions like MySQL or PostgreSQL.
 Sun's official position is that JDBC does not stand for Java Database Connectivity, possibly because of trademark issues with Microsoft's ODBC, Open Database Connectivity; however, it is the generally accepted assumption and a useful memory bridge to remember the acronym.
Other approaches for database systems included ISAM, hierarchical, or document-oriented databases, as well as X.500/LDAP repositories, and more recently, ...