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我有一個包含像以下計算時間差和求和基於另一列
ReferenceNo CommentDate StepName Originator StartTime
1 CHQRCL/0083/2013/FEB 2013-02-25 15:20:07.000 Initiate Process P8Admin 2013-02-25 15:20:07.000
1 CHQRCL/0083/2013/FEB 2013-02-25 15:20:44.000 Finance Controller P8Admin 2013-02-25 15:20:07.000
1 CHQRCL/0083/2013/FEB 2013-02-25 15:21:52.000 Originator P8Admin 2013-02-25 15:20:07.000
1 CHQRCL/0083/2013/FEB 2013-02-25 15:23:26.000 Finance Controller P8Admin 2013-02-25 15:20:07.000
1 CHQRCL/0083/2013/FEB 2013-02-25 15:23:55.000 Finance Officer P8Admin 2013-02-25 15:20:07.000
2 CHQRCL/0089/2013/FEB 2013-02-25 15:43:48.000 Initiate Process P8Admin 2013-02-25 15:43:48.000
2 CHQRCL/0089/2013/FEB 2013-02-25 15:43:59.000 Finance Controller P8Admin 2013-02-25 15:43:48.000
2 CHQRCL/0089/2013/FEB 2013-02-25 15:44:11.000 Asset GM P8Admin 2013-02-25 15:43:48.000
3 CHQRCL/0093/2013/MAR 2013-03-06 16:19:05.000 Initiate Process P8Admin 2013-03-06 16:19:05.000
3 CHQRCL/0093/2013/MAR 2013-03-06 16:21:57.000 Finance Controller P8Admin 2013-03-06 16:19:05.000
3 CHQRCL/0093/2013/MAR 2013-03-06 16:23:55.000 Asset GM P8Admin 2013-03-06 16:19:05.000
3 CHQRCL/0093/2013/MAR 2013-03-06 16:24:09.000 CFO P8Admin 2013-03-06 16:19:05.000
3 CHQRCL/0093/2013/MAR 2013-03-06 16:24:19.000 CEO P8Admin 2013-03-06 16:19:05.000
3 CHQRCL/0093/2013/MAR 2013-03-06 16:24:40.000 Finance Officer P8Admin 2013-03-06 16:19:05.000
4 CHQRCL/0094/2013/MAR 2013-03-06 16:58:47.000 Initiate Process P8Admin 2013-03-06 16:58:47.000
4 CHQRCL/0094/2013/MAR 2013-03-06 17:00:45.000 Finance Controller P8Admin 2013-03-06 16:58:47.000
4 CHQRCL/0094/2013/MAR 2013-03-06 17:00:54.000 Asset GM P8Admin 2013-03-06 16:58:47.000
4 CHQRCL/0094/2013/MAR 2013-03-06 17:04:48.000 CFO P8Admin 2013-03-06 16:58:47.000
4 CHQRCL/0094/2013/MAR 2013-03-06 17:05:06.000 CEO P8Admin 2013-03-06 16:58:47.000
4 CHQRCL/0094/2013/MAR 2013-03-06 17:05:35.000 Finance Officer P8Admin 2013-03-06 16:58:47.000
5 CHQRCL/0108/MAR/2013 2013-03-10 08:58:22.000 Initiate Process Mohamed Ubaid 2013-03-10 08:58:22.000
5 CHQRCL/0108/MAR/2013 2013-03-10 09:06:23.000 Finance Controller Mohamed Ubaid 2013-03-10 08:58:22.000
5 CHQRCL/0108/MAR/2013 2013-03-10 09:07:06.000 Finance Officer Mohamed Ubaid 2013-03-10 08:58:22.000
6 CHQRCL/0110/MAR/2013 2013-03-10 09:26:10.000 Initiate Process Allan C Fampulme 2013-03-10 09:26:10.000
6 CHQRCL/0110/MAR/2013 2013-03-10 09:32:34.000 Finance Controller Allan C Fampulme 2013-03-10 09:26:10.000
6 CHQRCL/0110/MAR/2013 2013-03-10 09:33:22.000 Asset GM Allan C Fampulme 2013-03-10 09:26:10.000
6 CHQRCL/0110/MAR/2013 2013-03-10 09:35:39.000 Originator Allan C Fampulme 2013-03-10 09:26:10.000
6 CHQRCL/0110/MAR/2013 2013-03-10 09:36:06.000 Asset GM Allan C Fampulme 2013-03-10 09:26:10.000
6 CHQRCL/0110/MAR/2013 2013-03-10 09:36:20.000 CFO Allan C Fampulme 2013-03-10 09:26:10.000
6 CHQRCL/0110/MAR/2013 2013-03-10 09:36:41.000 CEO Allan C Fampulme 2013-03-10 09:26:10.000
6 CHQRCL/0110/MAR/2013 2013-03-10 09:37:34.000 Finance Officer Allan C Fampulme 2013-03-10 09:26:10.000
首先，我想（對各步驟的時間，這是說用於財務總監參考沒有1的數據，例如一個表格，它花費了37秒）每個參考號碼。我想計算平均值（以財務控制檯的步驟爲例，它用1秒的時間爲7秒+ 1秒的時間再次爲94秒+ 2秒的時間爲11秒+依此類推6）
我曾與CTE AS（ SELECT ROW_NUMBER（）OVER（PARTITION BY ReferenceNo ORDER BY CommentDate）嘗試作爲ROWNUM ，* FROM ŤFNCUSTOM.dbo.WorkflowHistory \t --where stepname！= '啓動過程' ） SELECT DiffSec = DATEDIFF（S，CommentDate，（SELECT CommentDate FROM CTE C2 WHERE c2.ReferenceNo = CTE.ReferenceNo AND c2.RowNum = CTE.RowNum + 1）） ，ReferenceNo ，StepName ，CommentDate FROM CTE where referenceno ='CHQRCL/0157/MAR/2013' ORDER BY ReferenceNo，RowNum; – 2013-03-13 04:55:42
其給出以下輸出 – 2013-03-13 04:56:16
\t DiffSec ReferenceNo \t \t StepName CommentDate CHQRCL/0083/2013/FEB \t啓動過程\t 2013年2月25日15：20：07.000 CHQRCL/0083/2013/FEB \t金融控制器\t 2013年2月25日15：20：44.000 CHQRCL/0083/2013/FEB \t \t發起人15 2013年2月25日：21：52.000 CHQRCL/0083/2013/FEB \t財務總監\t 2013 -02-25 15：23：26.000 NULL財務主任\t 2013-02-25 15：23：55.000 – 2013-03-13 04:56:46