>Hi !
>
>I have a table with a primary key id to have a unique tuple and
>
>I want to check that (fk_acount + code) is unique.
>
>I don't know how to create this CHECK CONSTRAINT
>
>create table amount(
> id int4 constraint pk_amount primary key,
> fk_acount int4 not null,
> code char(3) not null
>);
>
>Thanks in advance.
>
>Stephane
>
>
