把内表 itab1 的 n1 到 n2 行内容附加到 itab2 内表中去.详解编程语言

语法：append lines of itab1 [ from n1 ] [ to n2 ] to itab2.

 前提应该是要两个结构是一样的内表吧。

DATA:BEGIN OF gt_00 OCCURS 0,
        l_01   TYPE i,
        l_02   TYPE i,
        l_03   TYPE i,
      END OF gt_00.

DATA:gw_00 LIKE LINE OF gt_00.

DATA:BEGIN OF gt_01 OCCURS 0,
        l_01   TYPE i,
        l_02   TYPE i,
        l_03   TYPE i,
      END OF gt_01.

DATA:gw_01 LIKE LINE OF gt_01.
gw_00–l_01 = 1.
gw_00–l_02 = 1.
gw_00–l_03 = 1.

APPEND gw_00 TO gt_00.

gw_00–l_01 = 2.
gw_00–l_02 = 2.
gw_00–l_03 = 2.

APPEND gw_00 TO gt_00.

gw_00–l_01 = 3.
gw_00–l_02 = 3.
gw_00–l_03 = 3.

APPEND gw_00 TO gt_00.

gw_01–l_01 = 4.
gw_01–l_02 = 4.
gw_01–l_03 = 4.

APPEND gw_01 TO gt_01.

gw_01–l_01 = 5.
gw_01–l_02 = 5.
gw_01–l_03 = 5.

APPEND gw_01 TO gt_01.

gw_01–l_01 = 6.
gw_01–l_02 = 6.
gw_01–l_03 = 6.

APPEND gw_01 TO gt_01.

APPEND LINES OF gt_01 FROM 2 TO 3 TO gt_00.

LOOP AT gt_00 INTO gw_00.
  write:/ gw_00–l_01,
          gw_00–l_02,
          gw_00–l_03.

ENDLOOP.

选择屏幕的完整实例

         1           1           1
         2           2           2
         3           3           3
         5           5           5
         6           6           6