A. JDBC is Java Database Connectivity. It allows you to have a single API for connecting to, manipulating, and retrieving information from a multitude of Databases like PostgreSQL, MySQL, Oracle, DB2, etc. JDBC home page
Please note that for arcane marketing reasons JDBC is officially NOT an acronym.
Q. Where do I start learning about JDBC?
A. The most obvious and best place to start is the Java JDBC Tutorial. Another (extensive) JDBC tutorial can be found here. See the JDBC forum when you have questions reading.
Q. What databases does JDBC support?
A. Most all Database Vendors will have a JDBC Driver for their Database. Oracle provides a list of companies that have JDBC compatible products.
Q. What are the differences between the 4 types of drivers?