Though Oracle provides an internal function to generate random numbers, there is no function that gives a random number between any two given integers. Sometimes this is needed to pull random data for test cases. The following function generates a random number between any given two integers. The script is easily updatable to include pulling random_date between two given dates (by converting the date into a Julian date and converting back to date). It has been tested on v. 188.8.131.52.
create or replace function myrand(a IN int,b IN int) return number is begin return trunc(abs(( GREATEST(a,b) - LEAST(a,b) + 1 ) * abs(dbms_random.value)) + LEAST(a,b)); end; /
Here is an example:
1* select myrand(10,20) from dual SQL> / MYRAND(10,20) ------------- 18 SQL> select myrand(-1,-20) from dual 2 SQL> / MYRAND(-1,-20) -------------- -16
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