使用pyodbc在MS Access中执行UPDATE查询

Question

我有一个像

这样的查询

qry = '''
            UPDATE H660_Links 
            SET H660_Links.[_AdjLocFrm] = iif(H660_Links.[LocationFrom] Like '*_h' Or 
            H660_Links.[LocationFrom] Like '*_P' Or 
            H660_Links.[LocationFrom] Like '*_F',
            Left(H660_Links.[LocationFrom],Len(H660_Links.[LocationFrom])-2),H660_Links.[LocationFrom])
        '''
        crsr.execute(lb.cleanqry(qry))
        cnxn.commit()

但更新未发生且字段仍未更新。有什么建议吗？