Re: Need help with INNER Join

Поиск
Список
Период
Сортировка
От Mag Gam
Тема Re: Need help with INNER Join
Дата
Msg-id 1cbd6f830805041712u54f33ecau4fd6c1a2ee69e7cb@mail.gmail.com
обсуждение исходный текст
Ответ на Re: Need help with INNER Join  (Frank Bax <fbax@sympatico.ca>)
Список pgsql-novice
All,

thanks for the help. I will try this.

TIA


On Sun, May 4, 2008 at 10:52 AM, Frank Bax <fbax@sympatico.ca> wrote:
Mag Gam wrote:
When I needed to join tables I always used the equal syntax (ie. SELECT id from foo,fee where id.foo=id.fee)
 To my understanding, it is preferred to use the INNER JOIN keyword. I am able to INNER JOIN 2 tables, but I am not sure of the syntax for 3 or more tables. Can someone please show me an example for that ?


Your example will not work; you should have written:

SELECT foo.id from foo,fee where foo.id=fee.id

With inner join, this would be

SELECT foo.id FROM foo
INNER JOIN fee on foo.id=fee.id

Joining a third table would look like

SELECT foo.id FROM foo
INNER JOIN fee ON foo.id=fee.id
INNER JOIN bar ON bar.id=foo.id




--
Sent via pgsql-novice mailing list (pgsql-novice@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-novice

В списке pgsql-novice по дате отправления:

Предыдущее
От: Emil Obermayr
Дата:
Сообщение: Re: Need help with INNER Join
Следующее
От: "Cody Konior"
Дата:
Сообщение: Schema/Trigger help