OUTER JOIN을 하면 에러가 납니다

왜 그럴까요? ㅠ.ㅠ

하루 종일 인터넷을 뒤져도 답이 안나옵니다

죄송한데요. 급한데.. 고수님들~~~~~~~~~~ 제발 도와 주세요

SELECT *

FROM ZTFIE0001 M , ZTFIE2003 A

WHERE A.REQ_NO = M.REQ_NO

AND M.REQ_FG ='S'

 LEFT OUTER JOIN ZTFIE2004 AS B ON

 A.REQ_NO = B.REQ_NO

AND A.REQ_NO ='1111111111'

----------------------------------------------------

ERROR [42601] [IBM][DB2/AIX64] SQL0104N  An unexpected token "'S'  LEFT OUTER JOIN ZTFIE2004 AS B" was found following "EQ_NO AND M.REQ_FG =".  Expected tokens may include:  "<name>".  SQLSTATE=42601