You can open multiple Interactive SQL windows, each corresponding to a separate database connection. Use multiple windows to connect simultaneously to two (or more) different databases on different servers or to open concurrent connections to a single database.
To open a new Interactive SQL window:
Choose File → New Window.
In the resulting Connect dialog, enter connection options, and click OK to connect.
You can also connect to or disconnect from a database with the Connect and Disconnect commands in the SQL menu, or by executing a CONNECT or DISCONNECT statement.