给大家出一个简单的小问题（ABAP）

LOOP AT xh_itabl.

      SELECT SUM( erfmg ) SUM( dmbtr )  INTO (wa_it-erfmg, wa_it-dmbtr)

      FROM mseg

      WHERE  bwtar IN so_bwart AND

             mseg~matnr = xh_itabl-matnr AND

             werks = xh_itabl-werks AND

             shkzg = 'H'.

IF wa_it-erfmg <> space.

        xh_itabl-nprice = wa_it-dmbtr / wa_it-erfmg.

        MODIFY xh_itabl.

ENDIF.

endloop.

要求：

1. 将 select 从loop 里面拿出来。

2. 不用select sum.