在摘要 SSRS 报告中使用来自不同数据库的数据集的问题

Question

我有一个报告来显示用户的摘要，从 2 个数据库中获取数据。我编写了单独的数据集来为每一列获取它， 但由于值可能重复，我不知道如何获取每个用户的所有记录

我在查询中使用 UNION ALL 从 2 个数据库中获取数据

主数据集

Select Count(*) as total, Username from database1
where my condition...
group by Username   
UNION ALL
Select Count(*) as total, Username from database2
where my condition...
group by Username 

Username    Total
User1       2  
User2       1  
User3       3
User4       4
User5       10
User6       5

数据集 2

Select Count(*) as totalCol2, Username from database1
where condition for this column...
group by Username   
UNION ALL
Select Count(*) as totalCol2, Username from database2
where condition for this column...
group by Username 

Username    totalCol2
User1       2  
User2       1  
User2       1  
User3       3  
User3       2  
User4       1  
User5       2  
User5       3  
User6       4  

我使用MainDataset 来显示我的报告中的行，对于每一列我需要显示来自Dataset2 的摘要：

Username    Total   totalCol2
User1       2   2  
User2       1   2  
User3       3   5
User4       4   1
User5       10  5
User6       5   4

我尝试使用查找，但只从 dataset2 中获得了第一个匹配项，求和函数与条件但效果不佳。 有人可以给我一些想法，如果我可以在 SSRS 中做点什么。

报告有超过 10 列，每一列来自不同的数据集。

Answer 1

最简单的答案是更改数据集的查询，使其不返回多行：合并查询中的行。

真正简单的版本是将您现有的 Dataset2 查询包装在外部 Select ... Group By 中：

稍微修改了Dataset2：

SELECT
   Username,
   SUM(totalCol2) as totalCol2
FROM
(
   SELECT Count(*) AS totalCol2, Username FROM database1
   WHERE condition for this column...
   GROUP BY Username   
   UNION ALL
   SELECT Count(*) AS totalCol2, Username FROM database2
   WHERE condition for this column...
   GROUP BY Username
) AS tableA
GROUP BY Username

稍微大一点的重写会给你：

SELECT
   Username,
   COUNT(*) AS totalCol2
FROM
   (SELECT UserName FROM database1
    WHERE Condition
    UNION ALL
    SELECT UserName FROM database2
    WHERE Condition
    ) AS tableA
 GROUP BY Username

上述任何一个查询都可以很好地与查找功能配合使用。

但是如果你的 database1 和 database2 对于所有十个查询都是相同的，那么我会尝试将它们组合起来。可能是这样的：

SELECT
   Username,
   SUM(Col1) AS totalCol1,
   SUM(Col2) AS totalCol2,
   ...
FROM
   (SELECT
      UserName,
      CASE WHEN [columns meet condition for Col1]
       THEN 1 ELSE 0 END AS Col1,
      CASE WHEN [test for condition of Column2]
       THEN 1 ELSE 0 END AS Col2,
      ... 
    FROM database1

    UNION ALL
    SELECT
      UserName,
      CASE WHEN [columns meet condition for Col1]
       THEN 1 ELSE 0 END AS Col1,
      CASE WHEN [test for condition of Column2]
       THEN 1 ELSE 0 END AS Col2,
      ... 
    FROM database2
    ) AS tableA
 GROUP BY Username