用于检查特定值是否在行

Question

我有5列这样的表

+----+-------------------------+-----------+--------+-----------+
| Id |       CreateDate        | CompanyId | UserId | IsEnabled |
+----+-------------------------+-----------+--------+-----------+
|  1 | 2016-01-02 23:40:46.517 |         1 |      1 |         1 |
|  2 | 2016-01-16 00:07:59.857 |         1 |      2 |         1 |
|  3 | 2016-01-25 15:17:54.420 |         3 |      3 |         1 |
| 25 | 2016-03-07 16:48:39.260 |        24 |     10 |         0 |
| 26 | 2016-03-07 16:48:39.263 |        25 |      2 |         0 |
+----+-------------------------+-----------+--------+-----------+

（感谢http://www.sensefulsolutions.com/2010/10/format-text-as-table.html代表ASCII表！）

我试图检查是否为多个CompanyId记录了UserId。

到目前为止，我设法通过使用此查询检查UserId是否恰好出现多个

WITH T AS
(
SELECT * ,
        Count(*) OVER (PARTITION BY UserId) as Cnt
        From CompanyUser
)

select Distinct UserId
FROM T
Where Cnt >1 

正确返回2.

我遇到的问题是，如何参数化UserId并检查是否为多家公司录制了Id。

Answer 1

Declare @UserID as bigint    
Set @UserID = 2

select Distinct Count(CompanyID)
FROM ComapynUser
Where UserId = @UserId

我认为这可以满足您的需求。