Select 语句中的子查询

Question

我写了一个查询，return是一组代理的开放支持工单计数。当前查询 returns 超过 5 天的票：

SELECT groupname, 
       assignee, 
       Count(*) AS [Tickets Older Than 5 Days] 
FROM   zendeskunclosedticketexport 
WHERE  ( groupname = 'DC Web Ops' 
          OR groupname = 'DC Maintenance' 
          OR groupname = 'DC QC1' ) 
       AND ticketcreateddate < Dateadd(day, -5, Getdate()) 
GROUP  BY groupname, 
          assignee 
ORDER  BY groupname, 
          Count(*) DESC

查询结果样本：

groupname       assignee                Tickets Older Than 5 Days

DC Maintenance  Mubarak Ali             12
DC Maintenance  Abirami Selvanathan     11
DC Maintenance  Jemima Mohanraj         6
DC Maintenance  Praveena Rajan          6
DC Maintenance  Rahul Ramesh            6
DC Maintenance  Saravanan Varadharajan  6
DC Web Ops  Kasey Barber                16
DC Web Ops  Jamie Raines                11
DC Web Ops  Keith Washington            10
DC Web Ops  Patricia Gomez Imvendorize  6

我一直在尝试做的是也包括 10 天、30 天等的列，但一直无法这样做。我试图在 select 语句中编写一个子查询，以 return 计算相应的天数；类似下面的内容：

SELECT groupname, 
       assignee [currentAssignee],


       (SELECT Count(*) AS [Tickets Older Than 5 Days] 
            FROM   zendeskunclosedticketexport 
            WHERE  ( 
                    ticketcreateddate < Dateadd(day, -5, Getdate())
                    AND
                    assignee = [currentAssignee]
        )

       (SELECT Count(*) AS [Tickets Older Than 10 Days] 
            FROM   zendeskunclosedticketexport 
            WHERE  ( 
                    ticketcreateddate < Dateadd(day, -10, Getdate())
                    AND
                    assignee = [currentAssignee]
        )

        (SELECT Count(*) AS [Tickets Older Than 30 Days] 
            FROM   zendeskunclosedticketexport 
            WHERE  ( 
                    ticketcreateddate < Dateadd(day, -30, Getdate())
                    AND
                    assignee = [currentAssignee]
        )
FROM   zendeskunclosedticketexport

我基本上想在这里做的是将 Assignee 值从外部查询传递到内部查询...我知道这是不合法的，但希望它提供一些上下文我正在采取的方法。有什么方法可以将数据以临时变量的形式从外部查询传递到内部查询？

编辑：用户通知我缺少 FROM 子句，后来添加了这个。

Answer 1

您可以使用 SUM 个 CASE 语句更简单地完成此操作：

SELECT
    groupname,
    assignee,
    SUM(CASE WHEN ticketcreateddate < DATEADD(DAY, -5, GETDATE()) THEN 1 ELSE 0 END) AS [Tickets Older Than 5 Days],
    SUM(CASE WHEN ticketcreateddate < DATEADD(DAY, -10, GETDATE()) THEN 1 ELSE 0 END) AS [Tickets Older Than 10 Days],
    SUM(CASE WHEN ticketcreateddate < DATEADD(DAY, -30, GETDATE()) THEN 1 ELSE 0 END) AS [Tickets Older Than 30 Days]
FROM
    zendeskunclosedticketexport
WHERE
    groupname IN ('DC Web Ops', 'DC Maintenance', 'DC QC1')
GROUP BY
    groupname,
    assignee
ORDER BY
    groupname

您可以将 ORDER BY 设置为您需要的任何聚合列。

Select 语句中的子查询

Subquery within Select Statement

sql

sql-server

sql-server-2014