• ... protocol for communication (jdbc),

  • the subprotocol for communication (derby), and

  • the database name (books).

The subprotocol derby indicates that the program uses a Java DB/Apache Derby-specific subprotocol to connect to the database—recall that Java DB is simply the Oracle branded version of Apache Derby. Figure 24.24 lists the JDBC driver names and database URL formats of several popular RDBMSs.

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