sql - SQL Inner JOIN 与查询

Question

我正在尝试做这样的事情，但我不确定你是否可以通过内部连接来做到这一点：

SELECT "scores".* 
FROM "scores" 
    INNER JOIN "games" ON "games"."id" = "scores"."games_id" 
WHERE 
    "games"."date" >= '2013-02-11 19:30:11.799227' 
AND "scores".value > 350; 

谢谢您的帮助。此外，如果您知道如何编写 ActiveRecord / arel 语句，那么查询也会有所帮助。

我的模型如下所示：

class Score < ActiveRecord::Base
  belongs_to :game
  delegates :date, to: game
end

class Game < ActiveRecord::Base
  has_many :scores, dependent: :destroy
end

Answer 1

ActiveRecord 查询如下所示：

some_date = DateTime.parse('2013-02-11 19:30:11.799227')
score = 350
Score.joins(:game).
      where("games.date >= ? AND scores.value > ?", some_date, score)

这假设您belongs_to :game在分数模型中有。