Re: Help with a complex Update

Поиск
Список
Период
Сортировка
От Ross J. Reedstrom
Тема Re: Help with a complex Update
Дата
Msg-id 20011105092632.A4292@rice.edu
обсуждение исходный текст
Ответ на Help with a complex Update  (Orion <o2@trustcommerce.com>)
Список pgsql-sql
On Fri, Nov 02, 2001 at 03:15:36PM -0800, Orion wrote:
> I have a table of users and a table of user_actions.
> I'd like to have a first_action column in the user table. 
> 
> How would I go about updating that info.
> 
> I'd immagine it'd be something like this:
> 
> update user_info set first_action = (select min(action_timestamp) from 
> action_info where user_id = ?? current user id ??);

Guessing at your table schema, but I think you want:
update user_info set first_action =  min(action_timestamp) from action_info where action_info.user_id = user_id;

Ross


В списке pgsql-sql по дате отправления:

Предыдущее
От: Haller Christoph
Дата:
Сообщение: table permissions II
Следующее
От: Janning Vygen
Дата:
Сообщение: design tool