Re: Results with leading zero

Am Mon, 16 Jun 2008 11:48:01 +1000
schrieb novice <user.postgresql@gmail.com>:

You are watching for the lpad() function ...

> I have a table
>
> CREATE TABLE problem (
>   problem_id  integer,
>   solution_count integer
>   );
>
> INSERT INTO problem VALUES (1001, 4);
> INSERT INTO problem VALUES (1012, 11);
>
> SELECT * from problem;
>
>  problem_id | solution_count
> ------------+---------------
>        1001 |             4
>        1012 |            11
> (2 rows)
>
>
> Is there a way I could write a query to produce the following?  I will
> need the leading zero for solution < 10
>
>  problem_id | solution
> -------------+------------
>         1001 | 01
>         1001 | 02
>         1001 | 02
>         1001 | 04
>         1012 | 01
>         1012 | 02
>         1012 | 03
>         1012 | 04
>         1012 | 05
>         1012 | 06
>         1012 | 07
>         1012 | 08
>         1012 | 09
>         1012 | 10
>         1012 | 11
> (15 rows)
>
> Thanks.
>