From: | "A(dot) Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com> |
---|---|
To: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: Results with leading zero |
Date: | 2008-06-16 06:21:45 |
Message-ID: | 20080616062145.GB26025@a-kretschmer.de |
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Thread: | |
Lists: | pgsql-sql |
am Mon, dem 16.06.2008, um 11:48:01 +1000 mailte novice folgendes:
> 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
My previous answer was a little bit wrong (no leading zero for solution
< 10), sorry. But no problem:
select problem_id, to_char(generate_Series(1,solution_count),'09') as solution_count from problem ;
Andreas
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Andreas Kretschmer
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