Rails 3 ActiveRecord临时表

Question

如何在Rails 3中执行以下操作？

CREATE TEMPORARY TABLE average_user_total_time 
  (SELECT SUM(time) AS time_taken 
        FROM scores 
        WHERE created_at >= '2010-10-10' 
                and created_at <= '2010-11-11' 
        GROUP BY user_id);

SELECT COUNT(*) from average_user_total_time WHERE time_taken > 60 and time_taken < 600

我试过做类似的事情

create_table (:average_user_total_time), :temporary=> true do |t|

end

但不确定如何正确使用它.我需要在我的应用程序中使用它,而不是在迁移中.

Answer 1

谢谢安德鲁,我最终使用了以下建议.

http://richtextblog.blogspot.com/2007/09/mysql-temporary-tables-and-rails.html