Re: Query Advice

Op 30/03/2017 om 20:03 schreef Gary Chambers:
> All,
>
> Given the following tables:
>
> company
> -------
> company_id
> name
>
> postal_addresses
> ----------------
> postal_address_id
> company_id
> description
> addr
> city
> stprov
> zip
>
>
> I've been handling joins as such:
>
> select c.company_id,
> array(select concat_ws('|', pa.description, pa.addr, pa.city,
> pa.stprov, pa.zip)
> ) addrs
> from companies c inner join postal_addresses pa using (company_id)
> where company_id = 1731;
>
> Is there a better way to get the company information along with all of
> the
> addresses in a single query? This works, but it requires the additional
> step of splitting the addresses by the the delimiter at the application
> layer.
>
> Thanks for any advice you have.
>
> --
> G.
>
>

"better" depends very much on your needs. I tend to return this kind of
data as a JSON string
because python (django) can be instructed to automatically translate
that into an array that I can loop through.

Do you have any particular reason for wanting to do this in one query,
given that you seem to want
a regular resultset for the addresses?