SQL查詢沒有提供明顯的價值等問題

Question

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我想提出一個SQL查詢來顯示每個用戶的多個用戶的分數，也應該給avarage明星特定用戶已經achived一個高分榜，和MAX水平達到的，也是我想提出的總時間用戶在遊戲中通過總結每個級別的所有花費的時間計算..

我有以下問題：

1：我的SQL查詢不會給我每個用戶一行。

2：被ginving的總和是不是每個用戶，但所有的用戶的總和。

3：avarage STARS不與小數顯示。

4：我不能得到「score.time_spent」來計算的所有特定用戶已經打

我的SQL查詢在pressent時間的時間總和看起來像這樣：

SELECT DISTINCT 
game_users.username AS 'User Name', 
'Level Reached' = (SELECT DISTINCT MAX(score.game_level) FROM score 
     WHERE score.game_users_id IN 
     (SELECT game_users_id FROM game_users 
     WHERE game_users.id = score.game_users_id)), 
score.time_spent AS 'Total Time Spent', 
'Stars' = (SELECT DISTINCT AVG(score.stars) FROM score 
     WHERE score.game_users_id IN 
     (SELECT game_users_id FROM game_users 
     WHERE game_users.id = score.game_users_id)), 
'High Score' = (SELECT DISTINCT SUM(score.game_level_score) FROM score 
     WHERE score.game_users_id IN 
     (SELECT game_users_id FROM game_users 
     WHERE game_users.id = score.game_users_id)), 
game_users.current_state AS 'Online State'   
FROM 
game_users 
INNER JOIN score ON game_users.id = score.game_users_id 
GROUP BY 
game_users.id, 
game_users.username, 
score.game_level_score, 
score.game_level, 
score.time_spent, 
score.stars, 
game_users.current_state 
GO 

的 「game_users」 表看起來像這樣：

id      int  Unchecked 
firstname  varchar(100) Checked 
lastname  varchar(100) Checked 
email   varchar(100) Checked 
username  varchar(50)  Checked 
usr_pass  varchar(50)  Checked 
current_state   int  Checked 

的「分數」表看起來像這樣：

id       int  Unchecked 
game_users_id    int  Unchecked 
game_level   varchar(4)  Checked 
game_level_score numeric(18, 0) Checked 
stars      int  Checked 
time_spent    time(7)  Checked 

有人可以幫助我走出這個爛攤子？ :-)

問候

斯蒂格:-)

Answer 1

看起來這應該解決這個問題：

SELECT a.username AS 'User Name' 
    , MAX(b.game_level) AS 'Level Reached' 
    , CAST(DATEADD(millisecond,SUM(DATEDIFF(millisecond,0,CAST(b.time_spent AS DATETIME))),0) AS TIME) AS 'Total Time Spent' 
    , AVG(CAST(b.stars AS FLOAT)) AS 'Stars' 
    , SUM(b.game_level_score) AS 'High Score' 
    , a.current_state AS 'Online State' 
FROM game_users a 
JOIN score b 
    ON a.id = b.game_users_id 
GROUP BY a.username, a.current_state 

注：CAST線是從這個網站 - http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=121027

編輯：鑄造星星一樣浮動。

Answer 2

嘗試在一個子查詢做你的集合體。我不知道如果這是你需要什麼，但它應該設置你在正確的方向：

SELECT Game_Users.userName, 
     MaxLevel, 
     TimeSpent, 
     Stars, 
     HighScore, 
     Game_Users.Current_State [Online State] 
FROM game_users 
     INNER JOIN 
     ( SELECT Game_users_ID, 
        MAX(Game_Level) [MaxLevel], 
        AVG(Stars * 1.0) [Stars], 
        SUM(game_level_Score) [HighScore], 
        SUM(DATEDIFF(SECOND, 0, CAST(GETDATE() AS TIME))) [TimeSpent] 
      FROM Score 
      GROUP BY Game_Users_ID 
     ) score 
      ON score.Game_Users_ID = game_users.ID