Subject Re: [firebird-support] Aggregation by concatenation
Author Arno Brinkman
Hi,

> I had an idea of a new feature which I think could be useful, please
> tell me what you think. Currently, it's possible to aggregate a column
> as a sum, an average, an minimum or a maximum. It would be useful, in
> certain cirsumstances, to be able to aggregate a column by concatenating
> all the values, or perhaps by putting them all into an array.
>
> ...?

You meant :

TableA - FieldA

FieldA
--------
A12345
B12345
C12345


SELECT SUM(FielA) FROM TableA

SUM
------
A12345B12345C12345


There are many problems with this.
1) What is the output datatype for the SUM (this needs to be known at
prepare time)?
2) I do this on 1.000 records with a average of 500 characters per record?

I would say, write a SP :-)

Regards,
Arno Brinkman
ABVisie

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