Re: [GENERAL] using ID as a key

I recommend you read Momjian's online book, very informative and provides
all the necessary information about using various kinds of id's:
http://www.postgresql.org/docs/aw_pgsql_book/index.html

As for referential integrity using foreign keys, you can add this
functionality to postgresql using triggers. An example of this is
available in the contrib/spi directory, look for refint.*

Marc

On Fri, 4 Feb 2000, sheila bel wrote:

> Hi,
>
> I'm new to data base design so please bare with me if my
> question is so basic..
> I'm designing a database, two of the tables are EMPLOYEES and
> AGENCIES. I need an ID for each of them. I would also need to
> have the agencyID in the EMPLOYEES table so that I can identify
> which agency they belong to something like a foreign key. I know
> postgreSQL does not support it so how do I implement this ?
> What kind of data type should I use for the ID ? In general I
> do not know how to implement IDs and use them as keys.
> I've read the user manual and a bit of the programmer's
> manual several times but haven't found anything that will
> apply to this situation.
>
> Please Help. Thank You.
>
> -Sheila
>
>
>
>
> ************
>
>