Get Last Document from document flow

Question

I would like to retrieve last document flow's document. i use VBFA and pass Preceding sales and distribution document to where condition and get Subsequent sales and distribution document but i don't know how to get the latest one.
I use
select single VBELN into last_doc from vbfa
where VBELV = 'preceding doc'
order by ERDAT ERZET
but it's not work. How can i do that. Thanks!

Answer 1

try like this
data : begin of vbfat occurs 0,
        last_doc like vbfa-vbeln,      
        last_date like vbfa-erdat,
        end of vbfat.
select vbeln max( erdat ) into table vbfat from vbfa
        where VBELV = 'preceding doc'
          group by vbeln.
loop at vbfat.
<do the processing.>
endloop.
regards
shiba dutta