Question

我有分配任务的工作人员，我需要找到工作人员年初至今完成的任务的百分比......分配给他的那些任务。如果约翰被分配了10个任务，并且完成了5个我需要表明约翰已经关闭了.50（50％）。

我有两张桌子：任务和任务_cstm

任务t

| ID | STATUS |Date_Completed|

状态为“进行中”，“未开始”，“已完成”

Tasks_cst tc

| ID_C|Staff_Member|

这些表在t.id = tc.id_c

上连接

这将返回完成的数字：

(select count(*)as Completed from tasks_CSTM tc
 join tasks t
 on t.id = tc.id_c
 where status = 'completed'
 group by staff_member_C )

这将返回任务总数：

(select count(*)as Total from tasks_CSTM tc
join tasks t
on t.id = tc.id_c
group by staff_member_C )

这是我提出的，但它有错误：子查询返回的值超过1。

select staff_member_c,((select  count(*)as Completed from tasks_CSTM tc
join tasks t
on t.id = tc.id_c
where status = 'completed'
group by staff_member_C )/(select  count(*)as Total from tasks_CSTM tc
join tasks t
on t.id = tc.id_c
group by staff_member_C ))
from tasks t
join tasks_CSTM tc
on t.id = tc.id_C
group by staff_member_C

感谢任何帮助。

Answer 1

我想是这样的事情：

select staff_member_c, sum(case when status='completed' then 1.0 end)/count(*) as pctCompleted
from tasks_cstm tc
join tasks t
on t.id = tc.id_c
group by staff_member_c

你可能在case语句中需要“else 0.0”（但不要在MSSQL中），并且你可能需要在分母中使用nullif（count（*），0）（但可能不在任何DBMS中）。

Answer 2

这里有几个问题需要解决。其中一个是处理“年初至今”的部分。现在，使用Date_Completed列，无法知道何时分配/创建任务，这使我们无法了解年初至今的信息。除了问题的这一部分，这是我的查询应该工作。我有一个注释掉的WHERE子句，可以很容易地使用Date_Assigned列来查看年初至今的信息。

select
    staff_member
    , sum(case t.status when 'Completed' then 1.0 else 0 end) [Completed]
    , count(*) [Total]
    , sum(case t.status when 'Completed' then 1.0 else 0 end) / count(*) [CompletedPercent]
from
    tasks t
inner join tasks_cstm tc
    on t.id = tc.id_C
--where
--  dateadd(year, datediff(year, 0, Date_Assigned), 0) = dateadd(year, datediff(year, 0, getdate()), 0)
group by
    staff_member

以下是我曾经（不可理解地）测试它的设置代码：

create table tasks (ID int, Status varchar(50), Date_Completed date)
create table tasks_cstm (ID_C int, Staff_Member varchar(50))

insert into tasks
select 1, 'Not Started', null
union all
select 2, 'Completed', '2011-04-15'
union all
select 3, 'In Progress', null

insert into tasks_cstm
select 1, 'Cadaeic'
union all
select 2, 'Cadaeic'
union all
select 3, 'Cadaeic'

导致：

staff_member        Completed            Total       CompletedPercent
------------------- -------------------- ----------- -----------------------
Cadaeic             1.0                  3           0.333333

Answer 3

-- Tasks
declare @T table(ID int, Status varchar(20))
-- Tasks_cst
declare @TC table(ID_C int, Staff_Member varchar(20))

insert into @TC values (1, 'Staff 1')
insert into @TC values (2, 'Staff 2')
insert into @TC values (3, 'Staff 3')

insert into @T values (1, 'Completed')
insert into @T values (1, 'Completed')
insert into @T values (1, 'In Progress')
insert into @T values (2, 'Completed')
insert into @T values (2, 'In Progress')
insert into @T values (3, 'In Progress')

select *
from @TC as TC
  cross apply
    (select sum(case T.Status when 'Completed' then 1.0 else 0.0 end) / count(*)
     from @T as T
     where T.ID = TC.ID_C) as C(PrecentCompleted)

结果

ID_C        Staff_Member         PrecentCompleted
----------- -------------------- ---------------------------------------
1           Staff 1              0.666666
2           Staff 2              0.500000
3           Staff 3              0.000000

找一个人的收盘比率

3 个答案: