Connections must be ended under certain circumstances.
In Interactive SQL or Embedded SQL, a user or application issues an explicit DISCONNECT statement for the current connection, a specified connection, or all connections for that application
In Interactive SQL, a user selects SQL > Disconnect
In Sybase Central, a user selects Connections > Disconnect
An application with active connections, such as Interactive SQL or Sybase Central, is closed
In Interactive SQL or Embedded SQL, by issuing a DROP CONNECTION statement
In Sybase Central, by accessing the Users & Groups folder for the database