Package to generate random values, based on a model

I need to generate thousands of test strings based on a template (LLNNNNLL, where L stands for letter and N represents the numbers).
I was able to create, on a table, any useful combination: the next step is to get that 'good' a few tickets.

My problem is that using the following syntax I get tickets with "close to" number... just because I created using a sequence

SELECT TICKET_CODE
FROM TICKET_WELL SAMPLE (1) 
WHERE OWNER = 'OWNER_NAME'
AND rownum < 10;

I mean: AB1001CD, AC1003CB, BB1002AD...
while I need to get these tickets: AB1001CD, AC4667CD, SD8592GD etc...

First question: is there a like DBMS_RANDOM package that accepts as input a boss so I can simply replace MY package to create the TICKET_WELL table?
Second: Is there another way (right) to select a table trying to get the lines in a random order?
Third: If both answers are not... is there a way to mix the rows of a table to another?

Any suggestions are welcome.

Thank you
Marco

Here's a function I hit upwards to generate a randon number, based on an input mask.

create or replace
function random_string( p_mask           in varchar2)
return varchar2
as
v_random_number integer;
v_random_letter varchar2(1);
v_mask varchar2(20) := p_mask;
v_character varchar2(1);
v_random_string varchar2(20);
begin
for i in 1 .. length(v_mask)
loop
if substr(v_mask,i,1) = 'L'
Then
    v_random_number :=  dbms_random.value(1,26);
    v_character := chr(64+v_random_number);
elsif substr(v_mask,i,1) = 'N'
then
   v_random_number := dbms_random.value(0,9);
   v_character     := v_random_number;
end if;
v_random_string := v_random_string||v_character;
end loop;
return v_random_string;
end;

To select lines in a random order, you need to store the random number with a column, for example rowno and create an index on rowno.

create table random_rows
(rowno number,
  random_string varchar2(20)
);

then to get a random line, you can use

declare
v_rowno integer; -- must be integer
begin
v_rowno := dbms_random.value(1, v_rows_in_table);
select random_string
into v_random_string
from random_rows
where rowno := v_rowno;
end;

You can also replace the random line of the next generated random_string.
The only thing is that you can not guarantee that the random_string is unique,
If you need a unique index on the column of random_string, and he tries to insert a duplicate, you should try to insert another random number;

Tags: Database

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Hi Experts,
Sorry to resurrect my old thread - https://forums.oracle.com/message/10928049
As Frank Kulash suggested (his last message to above thread):
As you have probably noticed, the results of discrimination 1 and 9. That's because the numbers were being rounded up or down to produce integers from 1 through 9 numbers, but none were being rounded to produce 1 and no figures have been rounded down to produce 9. A good way to use the TOWER would be
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```
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SELECT ROUND (Dbms_Random.Value (1.9))
OF the double
CONNECT BY LEVEL < = 100;

Can any body please confirm the behavior?
-Nordine
(Oracle Database 11 g Enterprise Edition Release 11.2.0.3.0 - 64 bit Production)

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until the conversion of 8.5 to 8.9999 to 9.

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a 8 to 9.

If you use 0.5 to 9.5 in your random value that stop the discrimination against 1 and 9, because now

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[code]

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Language = "java" >

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[[catch (Exception e) {}]] >

Query = "" / client: processResponse / client: result "/ >"

[/ code]

That should do it

Package to generate random values, based on a model

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