SET CONNECTION [ connection-name ]
connection-name: identifier, or host variable
To change active connections.
START USING DATABASE, STOP USING DATABASE.
This command changes the current database connection. You can use the START USING DATABASE command several times naming the connection each time. Each time, the new connection becomes the current connection. You can use the SET CONNECTION statement to make the named connection current.
This command is functionally identical to the Embedded SQL command of the same name. See "SET CONNECTION statement".