关于 groupby 原因的 Sql Query 问题和错误

Question

我正在尝试计算每年的项目总数。以及有多少项目处于活动状态，有多少项目被取消。

我尝试按项目日期的原因分组，所以我们每年都有项目总数，但我不确定从哪里开始以及做什么

Select  ts.Id as projectid ,
    --a.ParentObjectId,
    ts.RequestName as ProjectDates,
    ts.Type,
    ts.Category,
    ts.SubType,
    ts.status as projectstatus,
    Count (ts.ReceptionDate),
    cast (ts.ReceptionDate as  Date) as ReceptionDate,

from [rpt].[TransmissionServicesRpt] ts  
left join [dbo].[AuditHistory] a on a.ParentObjectId = ts.Id
Left join [dbo].[User] u on a.CreatedById = u.id
Group by ts.id, ts.ReceptionDate

+ -------------+--------+------------+------------+- ---------+------------------+ |新项目 |活跃 |取消 |终止 |不活跃 |发扬光大 | + -------------+--------+------------+------------+- ---------+------------------+ | 2013 | 32 | 45 | 4 | 11 | 30 | | 2014 | 45 | 75 | 17 | 14 | 44 | | 2015 | 46 | 90 | 25 | 21 | 44 | | 2016 | 30 | 74 | 27 | 10 | 37 | | 2017 | 82 | 119 | 11 | 26 | 82 | | 2018 | 86 | 168 | 29 | 24 | 115 | | 2019 | 23 | 138 | 9 | 4 | 125 | + -------------+--------+------------+------------+- ---------+------------------+

Answer 1

您希望每年有一个结果行。所以按年分组。您可以通过YEAR 或DATEPART 获得它。然后有条件地计数：

select
  year(receptiondate) as year,
  count(*) as total,
  count(case when status = 'Active' then 1 end) as active,
  count(case when status = 'Cancelled' then 1 end) as cancelled,
  count(case when status = 'Terminated' then 1 end) as terminated,
  count(case when status = 'Inactive' then 1 end) as inactive,
  count(case when status = 'Carried Forward' then 1 end) as carried_forward
from rpt.transmissionservicesrpt
group by year(receptiondate)
order by year(receptiondate);