SQL 在独特过滤器中插入附加字段

Question

我想插入一个附加字段，以便在从 SQL 数据库检索记录时与现有字段结合使用。

当前查询：

SELECT CONVERT(date, [DateTime]) 'Date of Download', 
       ActionBy AS 'User Full Name', 
       COUNT(DISTINCT Identifier) 'Number of Downloads'
FROM [dbo].[AuditLog] 
WHERE ActionTaken = 'Clicked' 
    AND Type = 'Attachment Link' 
    AND CONVERT(date, [DateTime]) BETWEEN CONVERT(date,'" + scanStartDate.ToString("yyyy-MM-dd HH:mm:ss.fff") + "') 
    AND CONVERT(date,'" + scanEndDate.ToString("yyyy-MM-dd HH:mm:ss.fff") + "') 
GROUP BY CONVERT(date, [DateTime]), ActionBy 
HAVING COUNT(DISTINCT Identifier) > " + limit + " 
ORDER BY COUNT(DISTINCT Identifier) DESC";

我想在 DISTINCT 过滤器中使用现有的 Identifier 插入一个额外的过滤器 Remarks。

示例： COUNT(DISTINCT Identifier + Remarks) 'Number of Downloads'

我可以知道如何修改我当前的声明吗？

谢谢

示例数据：

其他列已最小化以最大化可见性。

Answer 1

尝试：

SELECT CONVERT(date, [DateTime]) 'Date of Download', 
       ActionBy AS 'User Full Name', 
       COUNT(DISTINCT Identifier) + ' ' + COUNT(DISTINCT Remarks) 'Number of Downloads' 
FROM [dbo].[AuditLog] 
WHERE ActionTaken = 'Clicked' 
    AND Type = 'Attachment Link' 
    AND CONVERT(date, [DateTime]) BETWEEN CONVERT(date,'" + scanStartDate.ToString("yyyy-MM-dd HH:mm:ss.fff") + "') 
    AND CONVERT(date,'" + scanEndDate.ToString("yyyy-MM-dd HH:mm:ss.fff") + "') 
GROUP BY CONVERT(date, [DateTime]), ActionBy 
HAVING COUNT(DISTINCT Identifier) > " + limit + " 
ORDER BY COUNT(DISTINCT Identifier) DESC";

Answer 2

您可以 select 如下所示的字段，方法是将 FileID 转换为 NVARCHAR

COUNT(DISTINCT CAST(FileID AS NVARCHAR(10)) + Title) 'Number of Downloads'

SQL 在独特过滤器中插入附加字段

SQL Insert Additional Field in Distinct Filter

c#

sql

sql-server

distinct