Dears,
My name is Luis Ribeiro, I`m brazilian and I study Computer Science at
Universidade Presbiteriana Mackenzie (
http://www.mackenzie.br/portal/principal.php). I and Henrique Teixeira (cc)
are on the last semester and we`re doing our final project. To be honest,
we`re finishing its. It`s about Comparison between HD databases and
In-Memory databases.
We`re trying to use Apache Derby to know how it works with the simple
systems that we developed.
We have two doubts and I would be greatfull if you could answer to us:
- Does exist some function or method that you use similar to
"GROUP_CONCAT" (from MySQL)? I want to know if I can do this on a simple way
with Apache Derby?
Original table
ID | NAME
1 | Luis
2 | Henrique
3 | Luis
After do the query
ID | NAME
1, 3 | Luis
2 | Henrique
- What we need to do to have a exceptional performance with In Memory
mode? I`d increased jvm heap, but it didn`t work.
I`m sorry if I was offensive with this e-mail.
Thank you very much.
Best regards,
Luis Ribeiro
