CREATE [ SHARED ] [ PUBLIC ] DATABASE LINK dblink
  [ CONNECT TO
    { CURRENT_USER
    | user IDENTIFIED BY password [ dblink_authentication ]
    }
  | dblink_authentication
  ]
    [ CONNECT TO
      { CURRENT_USER
      | user IDENTIFIED BY password [ dblink_authentication ]
      }
    | dblink_authentication
    ]...
  [ USING connect_string ] ;