ORA -12504 : TNS: listner was not given the SERVICE_NAME in CONNECT_DATA**

creds=
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = aaa.cedd.net)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SID = creds)
    )
  )

creds=
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = aaa.cedd.net)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = creds)
    )
  )