Re: inner join and limit
От | msi77 |
---|---|
Тема | Re: inner join and limit |
Дата | |
Msg-id | 307921275836315@web135.yandex.ru обсуждение исходный текст |
Ответ на | inner join and limit (Michele Petrazzo - Unipex <michele.petrazzo@unipex.it>) |
Список | pgsql-sql |
Hi, Some ways to do that: http://www.sql-ex.ru/help/select16.php > Hi list, > I have two table that are so represented: > t1: > id int primary key > ... other > t2: > id int primary key > t1id int fk(t1.id) > somedate date > ... other > data t1: > 1 | abcde > 2 | fghi > data t2: > 1 | 1 | 2010-05-23 > 2 | 1 | 2010-05-24 > 3 | 1 | 2010-05-25 > 4 | 2 | 2010-05-22 > 5 | 2 | 2010-05-26 > I'm trying to create a query where the data replied are: > join t1 with t2 and return only the LIMIT 1 (or N) of the t2, with date > order (of t2). > Data should be: > t1.id | t2.id | t2,somedate > 1 | 3 | 2010-05-25 > 2 | 5 | 2010-05-26 > As said, I'm trying, but without success... > Can be done for you? > Thanks, > Michele > Здесь спама нет http://mail.yandex.ru/nospam/sign
В списке pgsql-sql по дате отправления: