Question

我的报告有一个钻取子报表，当它与多个与子报表无关的项目有多个关系时，会多次运行。

主报告查询

SELECT DISTINCT 
                         cat.CategoryName AS 'Category Name', sub.SubCategoryName AS 'SubCategory Name', cur.Status, cur.PastConsiderationFlag, cur.Model, cur.Version, cur.Vendor, cur.AvailableDate AS 'Available Date', cur.EndOfProduction AS 'End of Production', 
                         cur.EndOfSupport AS 'End of Support', dep.DepartmentName AS 'Department Name', emp.FirstName + ' ' + emp.LastName AS 'Tech Owner', emp2.FirstName + ' ' + emp2.LastName AS 'Tech Contact', 
                         cur.NumOfDevices AS '# of Devices', cur.UpgradeDuration AS 'Upgrade Duration', cur.FiscalConsideration AS 'Fiscal Consideration', cur.Description, cur.SupportingComments, cur.CurrencyId, STUFF
                             ((SELECT        ', ' + pl.PlatformName AS Expr1
                                 FROM            Platform AS pl LEFT OUTER JOIN
                                                          Currency_Platform AS cp ON cur.CurrencyId = cp.CurrencyId
                                 WHERE        (pl.PlatformId = cp.PlatformId) FOR XML PATH('')), 1, 1, '') AS 'Platforms', ISNULL(STUFF
                             ((SELECT        ', ' + cu2.Model AS Expr1
                                 FROM            Currency AS cu2 RIGHT OUTER JOIN
                                                          Currency_Dependency AS cd ON cur.CurrencyId = cd.CurrencyId
                                 WHERE        (cu2.CurrencyId = cd.DependencyId) FOR XML PATH('')), 1, 1, ''), 'N/A') AS 'Dependencies', ISNULL(STUFF
                             ((SELECT        ', ' + cu2.Model AS Expr1
                                 FROM            Currency AS cu2 RIGHT OUTER JOIN
                                                          Currency_Affected AS ca ON cur.CurrencyId = ca.CurrencyId
                                 WHERE        (cu2.CurrencyId = ca.AffectedId) FOR XML PATH('')), 1, 1, ''), 'N/A') AS 'Affected Apps', Currency_Platform.PlatformId
FROM            Currency AS cur INNER JOIN
                         SubCategory AS sub ON cur.SubCategoryId = sub.SubCategoryId INNER JOIN
                         Category AS cat ON sub.CategoryId = cat.CategoryId LEFT OUTER JOIN
                         Employee AS emp ON cur.OwnerId = emp.EmployeeId LEFT OUTER JOIN
                         Employee AS emp2 ON cur.ContactId = emp2.EmployeeId LEFT OUTER JOIN
                         Department AS dep ON cur.PortfolioOwnerId = dep.DepartmentId LEFT OUTER JOIN
                         Currency_Platform ON cur.CurrencyId = Currency_Platform.CurrencyId

即使它是一个独特的选择，子报表也将运行等于它所属的平台数量。我将在此处包含子报表的查询。

;with cte as (
-- anchor elements: where curr.Status = 1 and not a dependent
  select 
      CurrencyId
    , Model
    , Version
    , ParentId     = null
    , ParentModel  = convert(varchar(128),'')
    , Root         = curr.Model
    , [Level]      = convert(int,0)
    , [ParentPath] = convert(varchar(512),Model + Version)
  from dbo.Currency as curr  
  where curr.Status = 1
    /* anchor's do not depend on any other currency */
    and not exists (
      select 1 
      from dbo.Currency_Dependency i
      where curr.CurrencyId = i.DependencyId
      )
  -- recursion begins here
  union all 
  select 
      CurrencyId   = c.CurrencyId
    , Model        = c.Model
    , Version      = c.Version
    , ParentId     = p.CurrencyId
    , ParentModel  = convert(varchar(128),p.Model + p.Version)
    , Root         = p.Root
    , [Level]      = p.[Level] + 1
    , [ParentPath] = convert(varchar(512),p.[ParentPath] + ' > ' + c.Model + ' ' + c.Version)
  from dbo.Currency as c
    inner join dbo.Currency_Dependency as dep
      on c.CurrencyId = dep.DependencyId
    inner join cte as p 
      on dep.CurrencyId = p.CurrencyId
)
select CurrencyId, ParentPath, Model + ' ' + Version AS 'Model' from cte
WHERE CurrencyId = @CurrencyId

当我单独运行子报表时，一切都很好。当我通过主报表打开子报表时，将CurrencyId作为参数传递，它的次数与它所属的平台数量相同。

有没有办法可以通过改进查询来纠正这个问题，或者正如我所希望的那样，强制子报表只运行一次，无论如何？

非常感谢你一看。

Answer 1

我不认为您的问题更多是关于SSRS而不是关于您的T-SQL代码。我猜测并说子报表对象位于报表的报表详细信息部分。这意味着子报表将为主查询数据集中的每一行呈现一次。我不知道您的容器报告实际上是什么样的，但是您可能有一个选项是将子报告包含在页眉或页脚部分中并让它运行一个MAX（），MIN（），您知道的值对于每一行都是相同的。

Answer 2

您可以使用SQL Server Profiler检查以下内容。

运行子报表查询的次数和参数
您的第一个查询返回了多少个值

SSRS子报表运行多次，我只想运行一次

2 个答案: