> Hi,
>
> I have the following kind of sql structure, in 3 levels:
>
> ---
> create table documents (
> id serial,
> name varchar(50),
> primary key (id)
> );
>
> create table lines (
> id serial,
> name varchar(50),
> document_id integer,
> primary key (id),
> f
Hi,
I have the following kind of sql structure, in 3 levels:
---
create table documents (
id serial,
name varchar(50),
primary key (id)
);
create table lines (
id serial,
name varchar(50),
document_id integer,
primary key (id),
foreign key (document_id) refere
