Template JDBC Coonections

*.mrt

...
jdbc.driver={myDriver};
jdbc.url={myConnectionUrl};
jdbc.username={myUserName };
jdbc.password={ myUserPassword };
...

An example for a SQLServer:

*.mrt

...
jdbc.driver=com.microsoft.sqlserver.jdbc.SQLServerDriver;
jdbc.url= jdbc:sqlserver://[serverName[\instanceName][:portNumber]][;property=value[;property=value]];
jdbc.username={myUserName };
jdbc.password={ myUserPassword };
...

http://msdn.microsoft.com/en-us/library/ms378428

An example for a Oracle:

*.mrt

...
jdbc.driver=oracle.jdbc.driver.OracleDriver;
jdbc.url=jdbc:oracle:thin:@[HOST][:PORT]:SID;
jdbc.username={myUserName };
jdbc.password={ myUserPassword };
...

http://www.orafaq.com/wiki/JDBC

An example for a POSTGreSQL:

*.mrt

...
jdbc.driver= org.postgresql.Driver
jdbc.url= jdbc:postgresql://[host]:[port]/[database]
jdbc.username={myUserName };
jdbc.password={ myUserPassword };
...

http://jdbc.postgresql.org/documentation/80/connect.html