Re: Help with a view

I don't understand how this is different:

SELECT person FROM principals
WHERE event IN (SELECT event FROM principals WHERE person = $p AND
tag_type = " .MARR. ")
AND person != $p
ORDER BY sort_date

Or without subselects:

SELECT p1.person
FROM principals p1
JOIN principals p2 USING(event)
WHERE p2 person = $p
AND p2.tag_type = " .MARR. "
AND p1.person != $p
ORDER BY sort_date

Am I being confused?

Dmitri

> -----Original Message-----
> From: pgsql-sql-owner(at)postgresql(dot)org
> [mailto:pgsql-sql-owner(at)postgresql(dot)org] On Behalf Of Leif B.
> Kristensen
> Sent: Thursday, September 22, 2005 2:12 PM
> To: pgsql-sql(at)postgresql(dot)org
> Subject: Re: [SQL] Help with a view
>
>
> On Thursday 22 September 2005 20:03, Dmitri Bichko wrote:
>
> > SELECT * FROM principals WHERE event = 15821 AND person != 2?
>
> Sure, that's a concise answer to what I actually wrote, but it wasn't
> exactly what I intended :)
>
> Basically, what I've got is the first person and the
> tag_type. I can do
> it with a function from PHP:
>
> function get_spouses($p) {
> $handle = pg_query("select person from principals
> where event in (select event from principals
> where person = $p and tag_type = " .MARR. ")
> order by sort_date");
> $i=0;
> $spouses = array();
> while ($row = pg_fetch_row($handle) {
> if $row[0] != $p
> $spouses[$i++] = $row[0];
> }
> return $spouses;
> }
>
> But this is *ugly* ...
> --
> Leif Biberg Kristensen
> http://solumslekt.org/
>
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