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A copy of this was sent to "Steve S." <DontWantTheSpam_at_gate.net>
(if that email address didn't require changing)
On Sun, 7 Jun 1998 13:20:36 -0400, you wrote:
>I am new at Oracle Programming. I am trying to create random numbers from 1
>to 1000 or 1 to 100,000, and can't find a good random number generator. I
>will call the numbers from a function.
>
>Please help!
>
>Thanks.
>
>Steve
>
Here is one (note that Oracle 8 has a dbms_random package that you could use as well)
create or replace package random
is
pragma restrict_references( random, WNDS, RNPS );
procedure srand( new_seed in number );
function rand return number; pragma restrict_references( rand, WNDS ); procedure get_rand( r OUT number ); function rand_max( n IN number ) return number; pragma restrict_references( rand_max, WNDS); procedure get_rand_max( r OUT number, n IN number );
end random;
/
create or replace package body random
is
multiplier constant number := 22695477; increment constant number := 1; "2^32" constant number := 2 ** 32; "2^16" constant number := 2 ** 16; "0x7fff" constant number := 32767; Seed number := 1; -- procedure srand( new_seed in number ) is begin Seed := new_seed; end srand; -- function rand return number is begin seed := mod( multiplier * seed + increment, "2^32" ); return bitand( seed/"2^16", "0x7fff" ); end rand; -- procedure get_rand( r OUT number ) is begin r := rand; end get_rand; -- function rand_max( n IN number ) return number is begin return mod( rand, n ) + 1; end rand_max; -- procedure get_rand_max( r OUT number, n IN number ) is begin r := rand_max( n ); end get_rand_max;
select userenv( 'SESSIONID' ) into seed from dual;
end random;
/
Thomas Kyte
tkyte_at_us.oracle.com
Oracle Government
Herndon VA
http://govt.us.oracle.com/ -- downloadable utilities
Anti-Anti Spam Msg: if you want an answer emailed to you, you have to make it easy to get email to you. Any bounced email will be treated the same way i treat SPAM-- I delete it. Received on Sun Jun 07 1998 - 14:36:35 CDT