Re: [GENERAL] How do you live without OUTER joins?

Поиск
Список
Период
Сортировка
От Herbert Liechti
Тема Re: [GENERAL] How do you live without OUTER joins?
Дата
Msg-id 387C3339.86CA7717@thinx.ch
обсуждение исходный текст
Ответ на Re: [GENERAL] How do you live without OUTER joins?  (admin <admin@wtbwts.com>)
Список pgsql-general
Bruce Bantos wrote:
>
> > I'm not sure if this is what you're looking for, but you can try:
> > select company_category.com_cat_long, company.company_name from
> > company_category, company where
> > company_category.com_cat_abbr=company.com_cat_abbr;
>
> A simple join like that will inlcude only the company records with a
> com_cat_abbr equal to an entry in the company_category table. You would not
> get all the records in the company table. In the example below, you would
> only get records for Microsoft and the United Way...the Coca Cola entry
> would not be included in the query. Thus the need for outer joins....

You may solve the problem with a union select by selecting the joined
records in the first statement and the remaining records in the second
statement.

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Herbert Liechti                     E-Mail: Herbert.Liechti@thinx.ch
ThinX networked business services        Stahlrain 10, CH-5200 Brugg
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

В списке pgsql-general по дате отправления:

Предыдущее
От: root
Дата:
Сообщение: (no subject)
Следующее
От: Adriaan Joubert
Дата:
Сообщение: Re: [GENERAL] constant column value in view with union