Martijn,
if you declare a unique constraint, doesn't it creates a unique index to
enforce the constraint?

Ernesto Cullen
ecullen@...
http://www.infoback.com.ar/buhardilla
Paraná, Entre Ríos
Argentina

----- Original Message -----
From: "Martijn Tonies" <m.tonies@...>
To: <firebird-support@yahoogroups.com>
Sent: Thursday, November 20, 2003 12:52 PM
Subject: Re: [firebird-support] A basic consultation


>
> > Driver
> > ===============================
> > Driver_ID integer PK
> > License_Number varchar(12) Unique index - NOT NULL
>
> Unique CONSTRAINT.
>
>
> Indices are for speed, constraints for integrity.