Search Postgresql Archives

Re: Help with a subselect inside a view

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, Aug 25, 2005 at 08:05:36AM -0500, Bruno Wolff III wrote:
> On Wed, Aug 24, 2005 at 23:12:17 -0700,
>   Bill Moseley <moseley@xxxxxxxx> wrote:
> > I need a little SQL help:
> > 
> > I'm trying to get a subselect working inside a view.
> 
> Unfortunately you didn't show us what you tried. My guess would be that
> you didn't enclose the subselect in parenthesis.

No, it wasn't that.  I just didn't want to look too foolish. ;)

DROP VIEW cl;
CREATE VIEW cl  (id, instructor)
    AS
        SELECT class.id, person.first_name
          FROM class, instructors, person
         WHERE instructors.person = person.id
           AND class.id = (
                   SELECT instructors.id
                     FROM instructors, person
                    WHERE instructors.class = class.id
                      AND person.id = instructors.person
                    LIMIT 1
                );

Which returns a row for every row in "instructors" table.


> The distinct on solution that was suggested is probably a better way to
> go anyway.

Turns out it is, Thanks.


-- 
Bill Moseley
moseley@xxxxxxxx


---------------------------(end of broadcast)---------------------------
TIP 3: Have you checked our extensive FAQ?

               http://www.postgresql.org/docs/faq

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux