从hiscore表创建他的核心列表

时间:2012-07-10 15:04:50

标签: sql-server

我想创建他的核心列表,但我很难做到。这是我的自己的桌面,我在每个游戏中都会将用户分数写入此表。

这是我的hiscore表的样子:

id    user_id    user_name    score    entry_date
-----------------------------------------------------------
1      1         tom          500      2012-06-05 14:30:00
2      1         tom          500      2012-06-05 10:25:00
3      2         jim          300      2012-06-05 09:20:00
4      2         jim          500      2012-06-05 09:22:00
5      3         tony         650      2012-06-05 15:45:00

我想获得前3个MAX分数,但我必须确定他们是否有相同的分数然后我应该取得首次输入的分数(基于entry_date列)

返回的查询应该是这样的。

1.  3      tony     650      2012-06-05 15:45:00     <- hi have to be first, because he have top score
2.  2      jim      500      2012-06-05 09:22:00     <- jim have the same score as tom, but he make that score before tom did so he is in second place
3.  1      tom      500      2012-06-05 10:25:00     <- tom have 2 entries with the same score, but we only take the one with smallest date

这是我写的SQL查询,但是使用该查询我得到了他的核心列表,但它没有被entry_date排序,我也不知道如何解决这个问题。

SELECT TOP 3
    hiscore.user_id,
    hiscore.user_name,
    MAX(hiscore.score) AS max_score,
FROM
    hiscore
GROUP BY
    hiscore.user_id, hiscore.user_name
ORDER BY
    max_score DESC

更新:关于得分总和问题

关于得分总和,我需要在查询原始的hiscore表时返回此查询:

user_id   user_name    score
--------------------------------
1          Tom        1000
2          Jim         800
3          Tony        650

如果有两个用户具有相同的得分总和,那么排名较高的用户是其核心表中的条目较少的用户。

2 个答案:

答案 0 :(得分:1)

试试这个:

;with cte as 
(Select id ,userID,score,entry_date,row_number() over(partition by userID
 order by score desc,entry_date) as row_num from Score
)
Select * from cte where row_num=1 ORDER BY Score DESC,entry_date 

// sum of score  for individual user 
Select  UserID,sum(Score) from Score
group by UserID

结果SqlFiddle

答案 1 :(得分:0)

修改:这第一个查询是谎言,不起作用! :),假设sql 2005+使用第二个

只需通过

将EntryDate添加到您的订单中
SELECT TOP 3 
    hiscore.user_id, 
    hiscore.user_name, 
    MAX(hiscore.score) AS max_score, 
FROM 
    hiscore 
GROUP BY 
    hiscore.user_id, hiscore.user_name 
ORDER BY 
    max_score DESC, entry_date DESC

编辑:啊我甚至没有看到小组 - 忘了那个,等一下!

这一个:P

SELECT * FROM (SELECT
    hiscore.user_id,
    hiscore.user_name,
    hiscore.score,
    hiscore.entry_date,
    ROW_NUMBER() OVER (PARTITION BY User_id ORDER BY Score DESC, entry_date) as scoreNo
FROM 
    hiscore 
) as highs WHERE ScoreNo = 1 ORDER BY Score DESC, entry_date

假设SQL 2005 +

编辑:

为了获得按分数排序的最佳分数,然后按条目数量排序,查询更简单:

SELECT user_id, user_name, SUM(score) as Score from hiscore
GROUP BY user_id, user_name
ORDER BY sum(score) DESC, count(score) 

这将为您提供按“得分”降序总和排序的分数,然后按升序的数量排序,这应该可以为您提供所需的分数