Update new records and delete old record? Urgent

Question

Iam updating some records from internal table to Data base table.
Please suggest me
INSERT DBTable FROM TABLE itab.     
UPDATE DBTable FROM  itab.
Delete existing records.
  DELETE  DBTable FROM TABLE itab_old.
Please suggest me

Answer 1

Got you..
Iam colecting some records to internal table from Data base table
based on year and month.
Then changing the date and months in interenla table
then inserrting this modified records of internal table into datta base table.
Finaly delete the old records with old dates.
Here is the suggestion..This is a logic and not the exact code..
DATA: ITAB TYPE STANDARD TABLE OF ZTABLE WITH HEADER LINE.
DATA: ITAB_OLD TYPE STANDARD TABLE OF ZTABLE WITH HEADER LINE.
SELECT * FROM ZTABLE
       INTO TABLE ITAB.
ITAB_OLD = ITAB.
ITAB-NEW_DATE = SY-DATUM.
MODIFY ITAB TRANPORTING NEW_DATE WHERE KEY_FIELD = 'DS'.
Deletion part.
DELETE ZTABLE FROM TABLE ITAB_OLD.
Insertion part
INSERT ZTABLE FROM TABLE ITAB.
Thanks,
Naren