What's wrong in this? Need help please..

Question

CREATE OR REPLACE PROCEDURE UPDATE_SOMETABLE
IS
BEGIN
LOOP
UPDATE SOMETABLE
SET SEQ_NO = MYSEQ.NEXTVAL
WHERE ROWNUM<1000;
EXIT WHEN SQL%ROWCOUNT = 0;
END LOOP;
COMMIT;
END;
/

Answer 1

I need  a way to commit rows in batches based on the rownum.Isn't this violating the ACID rule of database? A transaction should not be committed until it is fully complete.
Check - Atomicity (database systems)
>
Example: If one wants to transfer some amount of money from one account to another, then he/she would start a procedure to do it. However, if a failure occurs, then due to atomicity, the amount will either be transferred completely or will not even start. Thus atomicity protects the user from losing money due to a failed transaction.