Comparing 2 tables

[Former Member]

Hello All,

I am new to ABAP programming. I have simple task to perform.

I have 2 SE11 tables, and in ABAP program, i have to compare 2 tables, if there are some new records or modified(i can get this info by checking a flag, a table field) in table1 then i have to update table2.

Could you please send me a sameple code? I will try to simulate it to my requirement.

Regards,

Ravi

[RichHeilman]

You can loop at the first and read the second with a key to see if it has a correponding record.

Loop at itab1 .

 read table itab2 with key fld1 = itab1-fld1.
if sy-subrc = 0.
* Yes, there is a corresponding record in ITAB2.
endif.

endloop.

REgards,

Rich Heilman

[former_member181962]

select *

from ztab1

into itab1.

select *

from ztab2

into itab2.

loop at itab1.

read table itab2 with key field1 = itab1-field1.

if sy-subrc <> 0.

flag = 'X'.

exit.

endif.

endloop.

if flag = 'X'.

• modify table ztab2.

endif.

Regards,

Ravi

[Former Member]

Might records be deleted from the first table?

Rob

[Former Member]

Hai Ravi

Check the following code

LOOP AT ITAB1.

READ TABLE ITAB2 WITH KEY FIELD = ITAB1-FIELD.

IF SY-SUBRC <> 0.

v_flag = 'X'.

ENDIF.

ENDLOOP.

if v_flag = 'X'.

DELETE ITAB1.

endif.

Thanks & regards

Sreeni

Message was edited by: Sreenivasulu Ponnadi

[Former Member]

Hello Ravi,

Declare to internal tables.

Say Itab1 & Itab2.

Fetch the data from table 1 & 2 to internal table 1 & 2.

loop at itab1.

read table itab2 with key f1 = itab1=f1.

if sy-subrc NE =0.

flag = 'X'.

endif.

endloop.

Hope this will be useful for u.

Reward the points

Regards,

Vasanth

[Former Member]

Hi Ravi,

Consider the code below.

REPORT as.

TYPES : BEGIN OF tp_test,
        item(5),
        quan(2),
        END OF tp_test.
DATA : it_test1 TYPE STANDARD TABLE OF tp_test,
       wa_test1 TYPE tp_test,
       it_test2 TYPE STANDARD TABLE OF tp_test,
       wa_test2 TYPE tp_test,
       it_result TYPE STANDARD TABLE OF tp_test.

<b>*Scenario 1</b>

Internal Table : it_test1
<b>item   quan</b>
mfg03  50
mfg04  100
mfg05  20

Internal Table : it_test2
<b>item   quan</b>
mfg03  50
mfg04  120
mfg05  220

*Loop the second Table

LOOP AT it_test2 INTO wa_test2.

*Read the first table

  READ TABLE it_test1 INTO wa_test1 WITH KEY item = wa_test2-item
                                             quan = wa_test2-quan.


*If no entry present in the first table for entry in second table then append
*then append the second table entry.

  IF sy-subrc NE 0.
    APPEND wa_test2 TO it_result.
  ENDIF.

ENDLOOP.


<b>*Scenario 2</b>

Internal Table : it_test1
<b>item   quan</b>
mfg03  50
mfg04  100
mfg05  20

Internal Table : it_test2
<b>item   quan</b>
mfg03  70
mfg03  80
mfg05  230
mfg04  120
mfg04  160


<b>*Or if there are fields with same values for the key fields (Line items) in both the tables then use this.</b>

LOOP AT it_test1 INTO wa_test1.
  LOOP AT it_test2 INTO wa_test2 WHERE item NE wa_test1-item.

    APPEND wa_test2 TO it_result.
  ENDLOOP.
ENDLOOP.


*Now updating the Table.

MODIFY <DB TABLE name> FROM table it_result.

IF sy-subrc EQ 0.
  WRITE : / 'Table updated successfully'.

ENDIF.

Regards,

Arun Sambargi.

Message was edited by: Arun Sambargi