SELECT A.*, B.*
  FROM SSDB A
  LEFT OUTER JOIN
     (SELECT A.* FROM DANMST A
       WHERE A.FactoryCd='ABC'
         AND A.RLDATE=(SELECT MAX(RLDATE) FROM DANMST B
                        WHERE B.FactoryCd='ABC'
                          AND B.RLDATE <='2006-02-22'
                          AND A.ITCD=B.ITCD)B
       ON  A.FactoryCd=B.FactoryCd
       AND A.ITCD=B.ITCD
WHERE A.FactoryCD='ABC'
   AND A.ITCD='10001'


이케 했습니다.
물론,
SELECT A.* FROM DANMST A
       WHERE A.FactoryCd='ABC'
         AND A.RLDATE=(SELECT MAX(RLDATE) FROM DANMST B
                        WHERE B.FactoryCd='ABC'
                          AND B.RLDATE <='2006-02-22'
                          AND A.ITCD=B.ITCD
요놈은 됩니다.

그런데, LEFT OUTER JOIN절에 있는 내부QUERY는 안되나요?
자알 썼는데,,MSSQL에서는여..(물론, 오라클에서도요..)
도와주세요..고수님들~~~~