Problem: Z table data updates using SM30

Question

Hi,
I have a requirement, while updating records in a Z table
using SM30 Transaction.
The Structure of the table is below:
APMOD    Primary Key   Char(3)
KONST    Primary Key   Char(20)
ENDDA    Primary Key   DATS
BEGDA    Non Key       DATS   
and some other non key fields....
Problem:  This table should act something like Infotype in HR.  I mean Delimition of Records while creating or changeing the existing record.
Say there is a record
APMOD = OGMT
KONST = Organization Management
BEGDA = 01/01/2004
ENDDA = 12/31/9999
Whenever i am Inserting a new record with key
APMOD = OGMT and KONST = 'Organization Management'
and BEGDA = '01/01/2006'.
First it should update the old record with
BEGDA = 01/01/2004 and ENDDA = 12/31/2005
Then the new record needs to be inserted with
BEGDA = 01/01/2006 and ENDDA = 12/31/9999.
How can I achieve this using SM30? Can we write our own code somewhere? If yes Where and How?  Or is there any settings available for this requirement?
I can write a Z program to update this Table, but i should achieve this using SM30 only.
Let me know if you need any additional info. 
Regards,
Sudhakar.

Answer 1

Hi Sudhakar,
1. I tried the same at my end. It works fantastic !
   In  SM30 it shows
   'Delimit' Button
   'Expand <--> Collapse' Button.
    and accordingly delmits the records.
2. in SE11,
   Use the menu
   Utilities ---> Table Maintenance Generator
   and finally build a table maintenance
   to use in SM30.
3. When u use in SM30,
   u will achieve what u want.
4. Just make sure your field
   ENDDA has the data element ENDDA
   in table definition.
  It should also be key.
5. After this ENDDA column,
   there should be no other key column
  ( not even BEGDA)
I Hope it helps.
Regards,
Amit M.