SQL 查询以获取每个状态的总持续时间

Question

我正在研究这个的类似问题，但略有不同。

这是要在 SQL Server 2012 Management Studio 中重新创建的脚本：

CREATE TABLE #Tickets 
(
    TId1 varchar(6), 
    TId2 varchar(6),
    TSubmitBy varchar(200), 
    TDate DATE
);

CREATE TABLE #TiktProcess
(
    TId1 VARCHAR(6), 
    TId2 VARCHAR(6),   
    TProcessDesc VARCHAR(100), 
    TProcessStatus varchar(50),   
    TProcessFullName varchar(200),
    TProcessRecDate Date
);

INSERT INTO #Tickets (TId1, TId2, TSubmitBy, TDate) 
VALUES ('Tikt22', '111111', 'ASmith', '2022-05-01'), 
       ('Tikt22', '111112', 'BSmith', '2022-05-01');

INSERT INTO #TiktProcess (TId1, TId2, TProcessDesc, TProcessStatus, TProcessFullName, TProcessRecDate) 
VALUES  ('Tikt22', '111111', 'Ticket Submitted', 'Submitted', 'ASmith', '2022-05-01'), 
        ('Tikt22', '111111', 'Ticket Submitted', 'Accepted', 'AJohnson', '2022-05-02'), 
        ('Tikt22', '111111', 'Review New', 'Work In Progress', 'AWilliams', '2022-05-02'),  
        ('Tikt22', '111111', 'Review New', 'Assigned', 'AWilliams', '2022-05-05'), 
        ('Tikt22', '111111', 'Assigned Team1', 'Assigned', 'ABrown', '2022-05-05'),
        ('Tikt22', '111111', 'Assigned Team1', 'On Hold', 'BJones', '2022-05-13'), 
        ('Tikt22', '111111', 'Assigned Team2', 'Assigned', 'AGarcia', '2022-05-05'), 
        ('Tikt22', '111111', 'Assigned Team2', 'Work In Progress', 'CSmith', '2022-05-06'),  
        ('Tikt22', '111111', 'Assigned Team2', 'Waiting on Customer', 'BMiller', '2022-05-17'), 
        ('Tikt22', '111111', 'Assigned Team2', 'Accepted', 'ADavis', '2022-02-26'),
        ('Tikt22', '111111', 'Assigned Team1', 'Customer Approve', 'CBrown', '2022-05-13');

SELECT 
    A.TId1,
    B.TProcessDesc, B.TProcessStatus, B.TProcessRecDate, B.TProcessFullName,
    [duration] = DATEDIFF (day, B.TProcessRecDate, 
                           LEAD (B.TProcessRecDate, 1, B.TProcessRecDate) OVER (PARTITION BY B.TProcessDesc 
                                                                              ORDER BY B.TProcessRecDate)),     
    [total_duration] = -DATEDIFF (day, B.TProcessRecDate, 
                                  FIRST_VALUE(B.TProcessRecDate) OVER (PARTITION BY B.TProcessDesc ORDER BY B.TProcessRecDate))     
FROM
    #Tickets A 
JOIN
    #TiktProcess B ON A.TId1 = B.TId1   
                   AND A.TId2 = B.TId2  
WHERE
    B.TId2 = '111111'

/* Desired Results - Question 1
TId1   TId2   TProcessDesc      Total_Duration
Tikt22 111111 Ticket Submitted  1
Tikt22 111111 Review New        3
Tikt22 111111 Assigned Team 1   8
Tikt22 111111 Assigned Team 1   80

Desired Results - Question 2
TId1   TId2   TProcessDesc      Total_Duration TProcessStatus
Tikt22 111111 Ticket Submitted  1              Submitted, Accepted
Tikt22 111111 Review New        3              Assigned, Work In Progress
Tikt22 111111 Assigned Team 1   8              Assigned, On Hold, Customer Approve
Tikt22 111111 Assigned Team 1   80
*/

DROP TABLE #Tickets; 
DROP TABLE #TiktProcess;

当我运行我的 select 时，我得到以下信息：

我的问题是如何从第一个条目到最后一个条目为每个 TProcessDesc 获取 total_duration？例如，
是否可以将 TProcessStatus 与问题 1 的结果连接起来？

谢谢

Answer 1

这在 SQL Server 2012 中真的很难看：

SELECT TP.TId1, TP.TId2, TP.TProcessDesc, 
  TProcessStatuses = STUFF((SELECT CONCAT(',', TP2.TProcessStatus)
    FROM #TiktProcess AS TP2
    WHERE TP2.TId1 = TP.TId1 
      AND TP2.TId2 = TP.TId2 
      AND TP2.TProcessDesc = TP.TProcessDesc
    FOR XML PATH(''), TYPE).value(N'./text()[1]', N'varchar(max)'),1,1,''),
  Total_Duration = DATEDIFF(DAY, MIN(TP.TProcessRecDate), MAX(TP.TProcessRecDate))
FROM #Tickets AS T 
INNER JOIN #TiktProcess AS TP
ON T.TId1 = TP.TId1 and T.TId2 = TP.TId2 where TP.TId2 = '111111'
GROUP BY TP.TId1, TP.TId2, TP.TProcessDesc;

在 SQL Server 2017+ 中，您可以使用更简洁的方法：

SELECT T.TId1, T.TId2, TP.TProcessDesc, 
  TProcessStatuses = STRING_AGG(TP.TProcessStatus, ','), 
  Total_Duration   = DATEDIFF(DAY, MIN(TP.TProcessRecDate), MAX(TP.TProcessRecDate))
FROM #Tickets AS T 
INNER JOIN #TiktProcess AS TP
ON T.TId1 = TP.TId1 and T.TId2 = TP.TId2 where TP.TId2 = '111111'
GROUP BY T.TId1, T.TId2, TP.TProcessDesc;

两者产生相同的结果：

TId1 TId2 TProcessDesc TProcessStatuses Total_Duration

Tikt22 111111 Assigned Team1 Assigned,On Hold,Customer Approve 8

Tikt22 111111 Assigned Team2 Assigned,Work In Progress,Waiting on Customer,Accepted 80

Tikt22 111111 Review New Work In Progress,Assigned 3

Tikt22 111111 Ticket Submitted Submitted,Accepted 1

示例db<>fiddle

更多关于字符串聚合的信息：

String aggregation over the years in SQL Server

顺便说一句，请不要使用meaningless aliases like A and B, and please do read all the links here about asking a good database question。

SQL 查询以获取每个状态的总持续时间

SQL Query to get total duration for each status

sql

tsql

sql-server

TId1	TId2	TProcessDesc	TProcessStatuses	Total_Duration
Tikt22	111111	Assigned Team1	Assigned,On Hold,Customer Approve	8
Tikt22	111111	Assigned Team2	Assigned,Work In Progress,Waiting on Customer,Accepted	80
Tikt22	111111	Review New	Work In Progress,Assigned	3
Tikt22	111111	Ticket Submitted	Submitted,Accepted	1