Re: does this require a stored procedure?
| От | Manfred Koizar |
|---|---|
| Тема | Re: does this require a stored procedure? |
| Дата | |
| Msg-id | p7mnbv4tn42is323v8ja9jd3orbrrcfcdr@4ax.com обсуждение исходный текст |
| Ответ на | does this require a stored procedure? (Alex Rice <alrice@ARCplanning.com>) |
| Список | pgsql-sql |
On Thu, 8 May 2003 12:50:02 -0600, Alex Rice <alrice@ARCplanning.com>
wrote:
>Is it possible to rewrite this SQL query so it returns one row having
>the columns title and contentType, instead of two rows with the sname
>column? [...]
>
># SELECT rec_id, url, sname, sval FROM url, urlinfo
>WHERE url.rec_id = 1821
>AND url.rec_id = urlinfo.url_id
>AND sname in('title','Content-Type');
SELECT u.rec_id, u.url, t.sval AS title, c.sval AS "contentType" FROM url u INNER JOIN urlinfo t ON
(u.rec_id= t.url_id AND t.sname = 'title') INNER JOIN urlinfo c ON (u.rec_id = c.url_id AND c.sname =
'Content-Type')WHEREurl.rec_id = 1821;
Use LEFT JOINs if it's not sure that there is always a 'title' and a
'Content-Type'.
ServusManfred
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