You can use this
command for creating a
database session to create a connection to another
database instance.
Syntax
<use_serverdb_statement> ::= USE <
database_name_statement>Prerequisites
A user with the same name and password must exist on the new database instance.
Use
You switch to another database instance without having to leave the SAP DB Loader. It terminates the connection to the current database instance and sets up the new connection to the database instance.
All subsequent commands are referred to this database instance by the SAP DB Loader.

USE SERVERDB MK1 ON PCnew;