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

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