我正在尝试使用SQL查询执行高级订单
我有一个用于跟踪工作流及其相关活动的数据库
之前的活动（已完成）处于closed状态。他们同时拥有Active_Date和Closed_Date设置
当前活动处于active状态。设置了Active_Date，但Closed_Date为NULL
对于每个ECR.item_number，active州只有一项活动
我想通过
订购ECR.item_number但我希望订单基于active状态中哪个活动按降序排列A.ACTIVE_DATE 查询：
SELECT
ECR.item_number,
ECR.title,
convert(VARCHAR(10),ECR.CREATED_ON,120) AS [Date CR Created],
convert(VARCHAR(10),A.ACTIVE_DATE,120) AS [Activity Activated],
convert(VARCHAR(10),A.CLOSED_DATE,120) AS [Activity Closed],
A.STATE,
A.NAME AS [Activity Name],
(CASE
WHEN
(A.STATE='Closed')
THEN
DATEDIFF(DAY, A.ACTIVE_DATE, A.CLOSED_DATE)
END) AS [DAYS ACTIVITY (WAS) OPEN],
(CASE
WHEN
(A.STATE='Active')
THEN
DATEDIFF(DAY, A.ACTIVE_DATE, Getdate())
END) AS [DAYS ACTIVITY HAS BEEN OPEN]
FROM
innovator.ecr AS ECR
INNER JOIN innovator.workflow AS WF
ON CR.id = WF.source_id
INNER JOIN innovator.workflow_process AS WFP
ON WF.related_id = WFP.id
INNER JOIN innovator.workflow_process_activity AS WPA
ON WFP.id = WPA.source_id
INNER JOIN innovator.activity AS A
ON WPA.related_id = A.id
--Shown for clarity
ORDER BY
ECR.ITEM_NUMBER,
[Activity Activated]
示例返回数据
|-----------+-----------+-------------------+-----------------------+-----------------------+-------------------+-------------------------------+-------------------------------|
|CR Number | Title | Date CR Created | Activity Name | Activity Activated | Activity Closed | DAYS ACTIVITY (WAS) OPEN | DAYS ACTIVITY HAS BEEN OPEN |
|-----------+-----------+-------------------+-----------------------+-----------------------+-------------------+-------------------------------+-------------------------------|
|CR-000119 | ITEM 1 | 4/12/2012 | Submit CR | 4/12/2012 | 31/01/2013 | 58 | 0 |
|CR-000119 | ITEM 1 | 4/12/2012 | Check CR | 31/01/2013 | 13/02/2013 | 13 | 0 |
|CR-000119 | ITEM 1 | 4/12/2012 | Review CR | 13/02/2013 | 21/02/2013 | 8 | 0 |
|CR-000119 | ITEM 1 | 4/12/2012 | Technical Review | 21/02/2013 | 28/02/2013 | 7 | 0 |
|CR-000119 | ITEM 1 | 4/12/2012 | CRB Meeting | 28/02/2013 | NULL | NULL | 11 |
|CR-000123 | ITEM 2 | 6/12/2012 | Check CR | 6/12/2012 | 21/12/2012 | 15 | 0 |
|CR-000123 | ITEM 2 | 6/12/2012 | Submit CR | 6/12/2012 | 6/12/2012 | 0 | 0 |
|CR-000123 | ITEM 2 | 6/12/2012 | Review CR | 21/12/2012 | 17/01/2013 | 27 | 0 |
|CR-000123 | ITEM 2 | 6/12/2012 | Technical Review | 17/01/2013 | 6/03/2013 | 48 | 0 |
|CR-000123 | ITEM 2 | 6/12/2012 | CRB Meeting | 6/03/2013 | NULL | NULL | 5 |
|CR-000136 | ITEM 3 | 11/01/2013 | Submit CR | 11/01/2013 | 15/01/2013 | 4 | 0 |
|CR-000136 | ITEM 3 | 11/01/2013 | Check CR | 15/01/2013 | 16/01/2013 | 1 | 0 |
|CR-000136 | ITEM 3 | 11/01/2013 | Review CR | 16/01/2013 | 21/01/2013 | 5 | 0 |
|CR-000136 | ITEM 3 | 11/01/2013 | Technical Review | 21/01/2013 | 25/01/2013 | 4 | 0 |
|CR-000136 | ITEM 3 | 11/01/2013 | CRB Meeting | 25/01/2013 | 31/01/2013 | 6 | 0 |
|CR-000136 | ITEM 3 | 11/01/2013 | Technical Review | 31/01/2013 | 27/02/2013 | 27 | 0 |
|CR-000136 | ITEM 3 | 11/01/2013 | CRB Meeting | 27/02/2013 | NULL | NULL | 12 |
|-----------+-----------+-------------------+-----------------------+-----------------------+-------------------+-------------------------------+-------------------------------|
期望的结果
|-----------+-----------+-------------------+-----------------------+-----------------------+-------------------+-------------------------------+-------------------------------|
|CR Number | Title | Date CR Created | Activity Name | Activity Activated | Activity Closed | DAYS ACTIVITY (WAS) OPEN | DAYS ACTIVITY HAS BEEN OPEN |
|-----------+-----------+-------------------+-----------------------+-----------------------+-------------------+-------------------------------+-------------------------------|
|CR-000136 | ITEM 3 | 11/01/2013 | Submit CR | 11/01/2013 | 15/01/2013 | 4 | 0 |
|CR-000136 | ITEM 3 | 11/01/2013 | Check CR | 15/01/2013 | 16/01/2013 | 1 | 0 |
|CR-000136 | ITEM 3 | 11/01/2013 | Review CR | 16/01/2013 | 21/01/2013 | 5 | 0 |
|CR-000136 | ITEM 3 | 11/01/2013 | Technical Review | 21/01/2013 | 25/01/2013 | 4 | 0 |
|CR-000136 | ITEM 3 | 11/01/2013 | CRB Meeting | 25/01/2013 | 31/01/2013 | 6 | 0 |
|CR-000136 | ITEM 3 | 11/01/2013 | Technical Review | 31/01/2013 | 27/02/2013 | 27 | 0 |
|CR-000136 | ITEM 3 | 11/01/2013 | CRB Meeting | 27/02/2013 | NULL | NULL | 12 |
|CR-000119 | ITEM 1 | 4/12/2012 | Submit CR | 4/12/2012 | 31/01/2013 | 58 | 0 |
|CR-000119 | ITEM 1 | 4/12/2012 | Check CR | 31/01/2013 | 13/02/2013 | 13 | 0 |
|CR-000119 | ITEM 1 | 4/12/2012 | Review CR | 13/02/2013 | 21/02/2013 | 8 | 0 |
|CR-000119 | ITEM 1 | 4/12/2012 | Technical Review | 21/02/2013 | 28/02/2013 | 7 | 0 |
|CR-000119 | ITEM 1 | 4/12/2012 | CRB Meeting | 28/02/2013 | NULL | NULL | 11 |
|CR-000123 | ITEM 2 | 6/12/2012 | Check CR | 6/12/2012 | 21/12/2012 | 15 | 0 |
|CR-000123 | ITEM 2 | 6/12/2012 | Submit CR | 6/12/2012 | 6/12/2012 | 0 | 0 |
|CR-000123 | ITEM 2 | 6/12/2012 | Review CR | 21/12/2012 | 17/01/2013 | 27 | 0 |
|CR-000123 | ITEM 2 | 6/12/2012 | Technical Review | 17/01/2013 | 6/03/2013 | 48 | 0 |
|CR-000123 | ITEM 2 | 6/12/2012 | CRB Meeting | 6/03/2013 | NULL | NULL | 5 |
|-----------+-----------+-------------------+-----------------------+-----------------------+-------------------+-------------------------------+-------------------------------|
答案 0 :(得分：2)
在这种情况下，我发现ECR.item_number处于活动状态，并通过MAX（）OVER（）子句将此日期分配给整个组ECR.item_number。在SELECT语句中使用位置10的数字对新列进行进一步排序（升序）。您还可以使用别名作为排序列，而不是SELECT语句中位置10的数量
SELECT ECR.item_number,
ECR.title,
convert(VARCHAR(10),ECR.CREATED_ON,120) AS [Date CR Created],
convert(VARCHAR(10),A.ACTIVE_DATE,120) AS [Activity Activated],
convert(VARCHAR(10),A.CLOSED_DATE,120) AS [Activity Closed],
A.STATE,
A.NAME AS [Activity Name],
(CASE WHEN (A.STATE='Closed')
THEN DATEDIFF(DAY, A.ACTIVE_DATE, A.CLOSED_DATE)
END) AS [DAYS ACTIVITY (WAS) OPEN],
(CASE WHEN (A.STATE='Active')
THEN DATEDIFF(DAY, A.ACTIVE_DATE, Getdate())
END) AS [DAYS ACTIVITY HAS BEEN OPEN],
MAX(CASE WHEN A.CLOSED_DATE IS NULL THEN A.ACTIVE_DATE END) OVER (PARTITION BY ECR.item_number)
FROM innovator.ecr AS ECR
INNER JOIN innovator.workflow AS WF
ON CR.id = WF.source_id
INNER JOIN innovator.workflow_process AS WFP
ON WF.related_id = WFP.id
INNER JOIN innovator.workflow_process_activity AS WPA
ON WFP.id = WPA.source_id
INNER JOIN innovator.activity AS A
ON WPA.related_id = A.id
ORDER BY 10 ASC, ECR.ITEM_NUMBER, A.ACTIVE_DATE ASC
答案 1 :(得分：2)
关键是获取每个项目的Active活动的日期。这可以使用分析函数来完成：
[DateOfActiveActivity] = MIN(CASE WHEN A.CLOSED_DATE IS NULL THEN A.ACTIVE_DATE END) OVER(PARTITION BY ECR.item_number)
因此，要将其集成到您的查询中，您可以使用：
WITH CTE AS
( SELECT [CRNumber] = ECR.item_number,
ECR.title,
[DateCRCreated] = CAST(ECR.CREATED_ON AS DATE),
[ActivityActivated] = CAST(A.ACTIVE_DATE AS DATE),
[ActivityClosed] = CAST(A.CLOSED_DATE AS DATE),
A.STATE,
[ActivityName] = A.NAME,
[DAYSACTIVITYOPEN] = CASE WHEN A.STATE = 'Closed' THEN DATEDIFF(DAY, A.ACTIVE_DATE, A.CLOSED_DATE) END,
[DAYSACTIVITYHASBEENOPEN] = CASE WHEN A.STATE = 'Active' THEN DATEDIFF(DAY, A.ACTIVE_DATE, GETDATE()) END,
[DateOfActiveActivity] = MIN(CASE WHEN A.CLOSED_DATE IS NULL THEN A.ACTIVE_DATE END) OVER(PARTITION BY ECR.item_number)
FROM innovator.ecr AS ECR
INNER JOIN innovator.workflow AS WF
ON CR.id = WF.source_id
INNER JOIN innovator.workflow_process AS WFP
ON WF.related_id = WFP.id
INNER JOIN innovator.workflow_process_activity AS WPA
ON WFP.id = WPA.source_id
INNER JOIN innovator.activity AS A
ON WPA.related_id = A.id
)
SELECT [CR Number] = [CRNumber],
Title,
[Date CR Created] = CONVERT(VARCHAR(10), DateCRCreated, 120),
[Activity Activated] = CONVERT(VARCHAR(10), ActivityActivated, 120),
[Activity Closed] = CONVERT(VARCHAR(10), ActivityClosed, 120),
[STATE],
[Activity Name] = ActivityName,
[DAYS ACTIVITY (WAS) OPEN] = [DAYSACTIVITYOPEN],
[DAYS ACTIVITY HAS BEEN OPEN] = [DAYSACTIVITYHASBEENOPEN]
FROM CTE
ORDER BY DateOfActiveActivity ASC, ActivityActivated, ActivityClosed;