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Executing SQL towards a MySQL instance running on localhost port 3306. The parameter "-drivername MYSQL" specifies that we are using a JDBC driver specified in the DbVisualizer tool named MYSQL. For listing of the existing drivers use the Tools->Driver Manager in the DbVisualizer tool. Read more in Installing a JDBC Driver. 

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An alternative to use the -drivername you may use the parameters -driverclass and -driverpath to specify the JDBC driver.

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The above example connects to an Oracle instance on localhost and port 1521. Note that the separator character ':' between the different jar files is platform dependant. On Windows-based desktop platforms, the value of this field is the semicolon ";".