此处提供代码三例，仅供参考，还望指正。

1、（se30可以找到）

I = 1.

LOOP AT ITAB1 INTO WA1.

LOOP AT ITAB2 INTO WA2 FROM I.

IF WA2-K <> WA1-K.

I = SY-TABIX.

EXIT.

ENDIF.

" ...

ENDLOOP.

ENDLOOP.

2、（和上述有些不同）

DATA: fcount TYPE i.

fcount = 1.

SORT tvbrk BY vbeln.

SORT tvbrp BY vbeln.

LOOP AT tvbrp.

LOOP AT tvbrk FROM fcount.

IF tvbrk-vbeln = tvbrp-vbeln.

fcount = sy-tabix.

tvbrp-bukrs = tvbrk-bukrs.

tvbrp-vkorg = tvbrk-vkorg.

tvbrp-kunag = tvbrk-kunag.

tvbrp-fkdat = tvbrk-fkdat.

tvbrp-fkart = tvbrk-fkart.

MODIFY tvbrp.

EXIT.

ENDIF.

ENDLOOP.

ENDLOOP.

3、（se30提示）

LOOP AT tvbrp.

READ TABLE tvbrk