Re: loop data . Help me

Try this.

LOOP AT item_table.

  IF item_table-field_1 = Z_table-field_1 AND

      item_table-field_2 = z_table-field_2.

      item_table-sales_item_value = 1110.

      MODIFY item_table TRANSPORTING sales_item_value.

  ELSE.

     DELETE item_table.

  ENDIF.

ENDLOOP.