从用户 ID 获取计数

Question

我需要一种方法来获得ek与每个相关联的唯一计数userid

我想要的输出是：

74123    3

但我似乎无法准确获得 Distinct 计数的语法。我只能让它返回 TOTAL 计数，这不是我所追求的。

数据线

    CREATE TABLE [dbo].[___________Purple](
    [userid] [int] NULL,
    [ek] [char](100) NULL
) ON [PRIMARY]

GO
SET ANSI_PADDING OFF
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Black                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Black                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Black                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Black                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Black                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Black                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Green                                                                                               ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Pink                                                                                                ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Pink                                                                                                ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Pink                                                                                                ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Pink                                                                                                ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Pink                                                                                                ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Pink                                                                                                ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Pink                                                                                                ')
GO
INSERT [dbo].[___________Purple] ([userid], [ek]) VALUES (71423, N'Pink                                                                                                ')

Answer 1

尝试这个：

SELECT userid, COUNT(DISTINCT ek) AS total_ek
FROM dbo.[___________Purple]
GROUP BY userid;

结果：

对于像我这样对问题如何找到 3 个不同的 ek 感到困惑的人 - 确保向下滚动他史诗般的长 DDL 查询。