Re: SELECT DISTINCT ON removes results

Поиск
Список
Период
Сортировка
От David G. Johnston
Тема Re: SELECT DISTINCT ON removes results
Дата
Msg-id CAKFQuwY8jkPy1EB97WqLFMu2ATLQ7_ueHAczt5s4UDdp8-iMog@mail.gmail.com
обсуждение исходный текст
Ответ на Re: SELECT DISTINCT ON removes results  (Guyren Howe <guyren@gmail.com>)
Список pgsql-general


On Fri, Oct 28, 2016 at 2:17 PM, Guyren Howe <guyren@gmail.com> wrote:
On Oct 28, 2016, at 14:15 , Guyren Howe <guyren@gmail.com> wrote:

On Oct 28, 2016, at 13:50 , David G. Johnston <david.g.johnston@gmail.com> wrote:

​On its face the statement "DISTINCT ON removes results" is not at all surprising given its definition.

What is surprising is that it removes *all* results…

The inner query on its own appears to produce the same results, but the left join with it in either case produces different results.

​Then maybe you can help us and create reproducible example that demonstrates the bug so that it can be fixed.

David J.
 

В списке pgsql-general по дате отправления:

Предыдущее
От: Adrian Klaver
Дата:
Сообщение: Re: initdb createuser commands
Следующее
От: John R Pierce
Дата:
Сообщение: Re: initdb createuser commands