Sql server 2005 不同计数和按唯一计数求和

我有一个包含教程（tutorial\u id、user\u id、tutorial\u date）的表，我的任务是找出有多少用户完成了特定数量的教程

因此，如果有5个用户完成了6个教程，3个用户完成了2个教程，我希望得到以下输出：

Tutorial_Count (unique)            Number of Students With this Tutorial Count
6                                  5
2                                  3

我可以得到不同的计数（第一列）：

---

但我不知道如何计算这些计数括号中的用户数。

未经测试，请尝试以下方法：

;WITH cte AS
(
    SELECT COUNT(user_id) AS Tutorial_Count
    FROM tutorials
    GROUP BY user_id
)
SELECT DISTINCT
    Tutorial_Count,
    COUNT(*) OVER (PARTITION BY Tutorial_Count) AS [Number of Students With this Tutorial Count]
FROM
    cte;

;WITH cte AS
(
    SELECT COUNT(user_id) AS Tutorial_Count
    FROM tutorials
    GROUP BY user_id
)
SELECT DISTINCT
    Tutorial_Count,
    COUNT(*) OVER (PARTITION BY Tutorial_Count) AS [Number of Students With this Tutorial Count]
FROM
    cte;