Question

我正在SSRS Report Builder 2016中创建报告。

我有一组数据，其中包含一组代理机构以及每个月向每个代理机构收取的费用金额（总计帐单）。每个代理商可以为TotalBilled设置多个值。我想找到每个代理商的TotalBilled中位数。

我计算了查询中的中位数，但它取自所有代理商中的所有TotalBilled，而不仅仅是与我在参数中设置的代理商相关的TotalBilled。

这是我的数据集查询：

DECLARE @Cnt int = (SELECT COUNT(TotalBilled) FROM InvoiceLine)

select 
     a.AgencyID
     a.startdate,
     a.enddate,
     [TotalBilled],

     ((SELECT TOP 1 TotalBilled
     FROM   (
         SELECT  TOP (@Cnt/2) TotalBilled
         FROM    InvoiceLine I
         WHERE   TotalBilled is NOT NULL
         ORDER BY TotalBilled ASC
         ) AS I
     ORDER BY TotalBilled DESC) +
     (
     SELECT TOP 1 TotalBilled
     FROM   (
         SELECT  TOP (@Cnt/2) TotalBilled
         FROM    InvoiceLine I
         WHERE   TotalBilled is NOT NULL
         ORDER BY TotalBilled DESC
         ) AS I
     ORDER BY TotalBilled ASC)) / 2 AS MedianTotalBilled

from Agency a
left join invoiceLine invl
    on a.InvoiceID = invl.InvoiceID
where (a.agencyid in (@agency))
and (a.startdate >= @startdate and a.enddate <= @enddate)

更改meidan值计算以使其受我的参数影响而不仅仅是从整个数据库中提取的正确方法是什么？

编辑：

也将联接添加到中位数calc中并没有带来中位数的预期值。这是我目前正在尝试的方法：

(SELECT TOP 1 TotalBilled
     FROM   (
         SELECT  TOP (@Cnt/2) TotalBilled
         left join invoiceLine invl
              on a.InvoiceID = invl.InvoiceID
         where (a.agencyid in (@agency))
         and (a.startdate >= @startdate and a.enddate <= @enddate)
         and  TotalBilled is NOT NULL
         ORDER BY TotalBilled ASC
     ) AS I
 ORDER BY TotalBilled DESC)

Answer 1

我相信您希望将行限制添加到子选择中，如下所示

DECLARE @Cnt int = (SELECT COUNT(TotalBilled) FROM InvoiceLine)
    select 
         a.AgencyID
         a.startdate,
         a.enddate,
         [TotalBilled],

         ((SELECT TOP 1 TotalBilled
         FROM   (
             SELECT  TOP (@Cnt/2) TotalBilled
             FROM    InvoiceLine I
             WHERE   TotalBilled is NOT NULL
             and  a.InvoiceID = I.InvoiceID --new
             ORDER BY TotalBilled
             ) AS I
         ORDER BY TotalBilled DESC) +
         (
         SELECT TOP 1 TotalBilled
         FROM   (
             SELECT  TOP (@Cnt/2) TotalBilled
             FROM    InvoiceLine I
             WHERE   TotalBilled is NOT NULL
             and  a.InvoiceID = I.InvoiceID --new
             ORDER BY TotalBilled DESC
             ) AS I
         ORDER BY TotalBilled ASC)) / 2 AS MedianTotalBilled

    from Agency a
    left join invoiceLine invl
        on a.InvoiceID = invl.InvoiceID
    where (a.agencyid in (@agency))
    and (a.startdate >= @startdate and a.enddate <= @enddate)

编辑：行数选择器也必须受到限制

select 
     a.AgencyID
     a.startdate,
     a.enddate,
     [TotalBilled],



    ((SELECT TOP 1 TotalBilled
     FROM   (
         SELECT  TOP (
             (
                SELECT  count(*)
                FROM    InvoiceLine I
                WHERE   TotalBilled is NOT NULL
                and  a.InvoiceID = I.InvoiceID 
             )


             /2) TotalBilled
         FROM    InvoiceLine I
         WHERE   TotalBilled is NOT NULL
         and  a.InvoiceID = I.InvoiceID --new
         ORDER BY TotalBilled
         ) AS I
     ORDER BY TotalBilled DESC)

from Agency a
left join invoiceLine invl
    on a.InvoiceID = invl.InvoiceID
where (a.agencyid in (@agency))
and (a.startdate >= @startdate and a.enddate <= @enddate)

如何仅从主选择中可用的数据进行嵌套选择拉

1 个答案: