Hi,

> What influence does it have on a DB (using Firebird 1.0) when a table
> doesn't have a primary key ?

None.

However, how do you intend to identify a specific row if you
don't have a PK or Unique Constraint?

A PK/UC are used, by the db engine, to describe the data and
to avoid duplicates.


With regards,

Martijn Tonies
Database Workbench - the developer tool for InterBase & Firebird
Upscene Productions
http://www.upscene.com