> We want to store 64 bit integers in a FB 2.1 database (2.5 as soon as
> it's out and tested with our ECO app).
>
> What datatype should we use?

BIGINT.

> Also, does FB have a special GUID datatype? (I suppose char would do,
> but it's really just a very large integer isn't it? 128 bit?)

http://www.firebirdfaq.org/faq98/



--
Best Regards,
Thomas Steinmaurer
LogManager Series - Logging/Auditing Suites supporting
InterBase, Firebird, Advantage Database, MS SQL Server and
NexusDB V2
Upscene Productions
http://www.upscene.com
My blog:
http://blog.upscene.com/thomas/