On Mié 28 Nov 2001 19:42, you wrote:
> Can the SUM keyword in SELECT be generalized to strings?
>
> A tipical use for the SUM keyword is:
>
>     SELECT column1, SUM(column2)
>     FROM table
>     GROUP BY column1
>
> This works only if column2 contains numbers (and SUM is the mathematical
> sum).
>
> What about obtain the same behaviour, when column2 contains strings (and
> SUM is string concatenation)?

With which database engine?

-- 
Porqué usar una base de datos relacional cualquiera,
si podés usar PostgreSQL?
-----------------------------------------------------------------
Martín Marqués                  |        [EMAIL PROTECTED]
Programador, Administrador, DBA |       Centro de Telematica
                       Universidad Nacional
                            del Litoral
-----------------------------------------------------------------

-- 
PHP Database Mailing List (http://www.php.net/)
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
To contact the list administrators, e-mail: [EMAIL PROTECTED]

Reply via email to