On Mi� 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?
--
Porqu� usar una base de datos relacional cualquiera,
si pod�s usar PostgreSQL?
-----------------------------------------------------------------
Mart�n Marqu�s | [EMAIL PROTECTED]
Programador, Administrador, DBA | Centro de Telematica
Universidad Nacional
del Litoral
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