update and select question

[黄高峰]

i use this mail first .
(B
(Bi have a problem in under sql program:
(B
(B
(BUPDATE
(B    NGLDENHDT
(BSET
(B    EDT_HUK_FLG = :EDT_HUK_FLG
(BWHERE
(B  KAI_CDE = :KAI_CDE
(B  AND EDT_NUM = (SELECT MAX(EDT_NUM)
(B                               FROM NGLDENHDT
(B                               WHERE KAI_CDE = :KAI_CDE_T1
(B                               AND EDT_NUM != '9999');
(B
(Bthe error message was:
(B
(B            You can't specify target table 'NGLDENHDT' for update in FROM
(Bclause
(B
(B
(Bwhat can i do ,help me ?
(B
(B
(B  thank you very much!!