Connect to different database thru SQL Editor

Use this query to switch to different databases,
   Run SQL Editor,
      *Use any default credentials like,
           apps/apps@VIS

           system/manager@VIS

           scott/tiger@VIS

     

      *While working in the SQL Editor, if You need to switch to other user or database,
          Use this query,
            connect apps/apps@VIS

            connect  system/manager@VIS

            connect scott/tiger@VIS