INT OR VARCHAR

I have a table that will be populated with machines of a net we have. And we 
have more then 1 domain, so we thought about putting a seperate table with 
the domains, and a reference in the nodes table to the apropiate domain.

The question is, should I put an SERIAL field in the domain table and use 
that as the PK, and use an INT reference in the nodes table?
Or is it a good idea to just leave the domain name (a CHAR(30) field) in the 
domain table and make the node.domain a CHAR(30) that references to 
domain.name?
What would be the best approche?

Saludos... :-)

-- 
Porqué usar una base de datos relacional cualquiera,
si podés usar PostgreSQL?
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Martín Marqués                  |        mmarques@unl.edu.ar
Programador, Administrador, DBA |       Centro de Telematica                      Universidad Nacional
        del Litoral
 
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