Confused about how to use ORDER BY in the UNION

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  Hello world
  I have a situation and I need your help guys. I have to use ORDER BY in the UNION of two queries and return value in the cursor.
  
  OPEN FOR cursor
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  I do not receive correct sort that I can not use the command by like that in the UNION. Please let me know how I can handle this.
  
  Thanks in advance to everyone.
  I'd really appreciate your comments and your responses.

  You can try,

  SELECT ID,
         DESC,
         SID,
         ITID,
         SID_DESC
    FROM (SELECT A.ID,
                 A.DESC,
                 B.SID,
                 NULL AS ITID,
                 B.SID_DESC,
                 A.sortorder AS sortorder1,
                 b.sortorder AS sortorder2
            FROM TABLEA A, TABLEB B
           WHERE A.ID = B.ID
          UNION
          SELECT A.ID,
                 A.DESC,
                 NULL AS SID,
                 C.ITID,
                 C.ITID_DESC,
                 A.sortorder AS sortorder1,
                 c.sortorder AS sortorder2
            FROM TABLEA A, TABLEC C
           WHERE A.ID = C.ID)
  ORDER BY SORTORDER1 ASC, SORTORDER2
  

  G.

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