-------------------------------------------------------------------------------
CREATE OR REPLACE PROCEDURE reset_seq(
p_seq_name IN VARCHAR2 )
IS
l_val NUMBER;
BEGIN
EXECUTE immediate 'select ' || p_seq_name || '.nextval from dual' INTO l_val;
EXECUTE immediate 'alter sequence ' || p_seq_name || ' increment by -' || l_val || ' minvalue 0';
EXECUTE immediate 'select ' || p_seq_name || '.nextval from dual' INTO l_val;
EXECUTE immediate 'alter sequence ' || p_seq_name || ' increment by 1 minvalue 0';
END;
/
---------------------------------------------------------------------
DECLARE
P_SEQ_NAME VARCHAR2(200);
BEGIN
P_SEQ_NAME := 'W_DUMMY_D_SEQ';
RESET_SEQ(
P_SEQ_NAME => P_SEQ_NAME
);
--rollback;
END;\
Link:-
http://stackoverflow.com/questions/51470/how-do-i-reset-a-sequence-in-oracle
https://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1119633817597