我想爲使用底層SQL Server 2008 Analysis Services數據庫的Team Foundation Server 2010創建一些報告。立方體的「團隊系統」是TFS 2010報告中的一個。MDX SUM函數和NULL值
我的問題是。我嘗試使用FactWorkItemHistory的StateChangeCount度量。 對於一段時間沒有工作項狀態更改,但還有其他更改。 所以我們有一些具有NULL StateChangeCount的事實行,稍後會有介紹。
即使基礎事實行包含空值,狀態更改計數度量有時也會生成值0。此度量在[FactWorkItemHistory]。[StateChangeCount]中定義爲SUM。 NULLS的SUM返回0還是我錯過了某些東西? 有問題的時期是2013-03-01(3月)和2013-05-02(5月)。
SELECT
[DateSK],
COUNT(*) AS COUNT,
SUM([StateChangeCount]) AS SUM
FROM
[Tfs_Warehouse].[dbo].[FactWorkItemHistory]
WHERE
[WorkItemSK] IN (SELECT [WorkItemSK] FROM [Tfs_Warehouse].[dbo].[DimWorkItem] WHERE [System_WorkItemType] = 'Bug')
GROUP BY
[DateSK]
輸出爲:
DateSK COUNT SUM
---------------------------------------
2011-05-05 00:00:00.000 13 7
2012-03-01 00:00:00.000 2 NULL
2012-09-28 00:00:00.000 60 2
2013-05-02 00:00:00.000 16 NULL
2013-05-06 00:00:00.000 9 9
查詢:
SELECT
[DateSK],
[StateChangeCount]
FROM
[Tfs_Warehouse].[dbo].[FactWorkItemHistory]
WHERE
[WorkItemSK] IN (SELECT [WorkItemSK] FROM [Tfs_Warehouse].[dbo].[DimWorkItem] WHERE [System_WorkItemType] = 'Bug')
ORDER BY
[DateSK]
給出:
DateSK StateChangeCount
---------------------------------------
2011-05-05 00:00:00.000 1
2011-05-05 00:00:00.000 NULL
2011-05-05 00:00:00.000 NULL
2011-05-05 00:00:00.000 1
2011-05-05 00:00:00.000 NULL
2011-05-05 00:00:00.000 1
2011-05-05 00:00:00.000 NULL
2011-05-05 00:00:00.000 1
2011-05-05 00:00:00.000 NULL
2011-05-05 00:00:00.000 1
2011-05-05 00:00:00.000 NULL
2011-05-05 00:00:00.000 1
2011-05-05 00:00:00.000 1
2012-03-01 00:00:00.000 NULL
2012-03-01 00:00:00.000 NULL
2012-09-28 00:00:00.000 1
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 1
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2012-09-28 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-02 00:00:00.000 NULL
2013-05-06 00:00:00.000 1
2013-05-06 00:00:00.000 1
2013-05-06 00:00:00.000 1
2013-05-06 00:00:00.000 1
2013-05-06 00:00:00.000 1
2013-05-06 00:00:00.000 1
2013-05-06 00:00:00.000 1
2013-05-06 00:00:00.000 1
2013-05-06 00:00:00.000 1
最後MDX查詢:
SELECT
NON EMPTY { [Measures].[State Change Count] } ON COLUMNS,
NON EMPTY { ([Date].[Date].[Date].ALLMEMBERS * [Work Item].[System_State]. [System_State].ALLMEMBERS) }
ON ROWS FROM (
SELECT (
{ [Work Item].[System_WorkItemType].&[Bug] }
)
ON COLUMNS FROM [Team System])
WHERE ([Work Item].[System_WorkItemType].&[Bug])
結果:
StateChangeCount
---------------------------------------------
2011-05-05 Assigned 4
2011-05-05 For verification 2
2011-05-05 In progress 1
2012-03-01 Assigned 0
2012-09-28 Assigned 2
2013-05-02 Assigned 0
2013-05-06 Assigned 9
雖然
SELECT
NON EMPTY { [Measures].[State Change Count] } ON COLUMNS,
NON EMPTY { ([Date].[Date].[Date].ALLMEMBERS * [Work Item].[System_State]. [System_State].ALLMEMBERS) }
ON ROWS FROM (
SELECT (
{ [Work Item].[System_WorkItemType].&[Bug] }
)
ON COLUMNS FROM [Team System])
WHERE ([Work Item].[System_WorkItemType].&[Bug])
是:
State Change Count
------------------------------------
May 2011 7
June 2011 (null)
July 2011 (null)
August 2011 (null)
September 2011 (null)
October 2011 (null)
November 2011 (null)
December 2011 (null)
January 2012 (null)
February 2012 (null)
March 2012 0
April 2012 (null)
May 2012 (null)
June 2012 (null)
July 2012 (null)
August 2012 (null)
September 2012 2
October 2012 (null)
November 2012 (null)
December 2012 (null)
January 2013 (null)
February 2013 (null)
March 2013 (null)
April 2013 (null)
May 2013 9
June 2013 (null)
July 2013 (null)
August 2013 (null)
Unknown (null)
我可以看到,對於有問題的時期也有一些事實行,但含有其他工作項數據變化。我希望這些項目不應該污染結果,特別是對於SUM。對於COUNT,同意,看到零值是好的,但不適用於SUM。
任何幫助將不勝感激。
謝謝
您是否嘗試過使用AGGREGATE而不是SUM? – michele 2013-05-09 10:24:02