dbms_utility.get_hash_value computes a hash value for a given string (varchar2). base) specifies the minimum number that is returned. hash_size) specifies the number of buckets for the hash. base and hash_size - 1. select
dbms_utility.get_hash_value('a', 0, 128) val_1,
dbms_utility.get_hash_value('a', 1000, 128) val_2
from
dual;