Re: [SQL] Results with leading zero

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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.
>