Re: Autoincremental value

In article <14610181509(dot)20040813135048(at)asocmedrosario(dot)com(dot)ar>,
adburne(at)asocmedrosario(dot)com(dot)ar writes:

> Hi I'm a newbie in postgresql, I came from MSSQL, MySQL and now
> I'm testing postgres.
> In mysql there is a way to make a second autoincrement field, just:

> create table table1
> (field1 integer,
> field2 integer autoincrement,
> primary key (field1,field2))

> when insert rows:

> insert into table1 (field1) values (1);
> insert into table1 (field1) values (1);
> insert into table1 (field1) values (2);

> and then select * from table1, you get:
> field1| field2
> ------+-------
> 1 | 1
> 1 | 2
> 2 | 1
> ------+-------

Even MySQL disallows that - unless you use the MyISAM backend. The
only time when I used this ugly hack was when I looked for a
workaround to the missing subselects.

Perhaps you should describe what you're trying to achieve. I'm pretty
sure PostgreSQL has an elegant solution for that.