多行总和和计算字段

Question

我正在尝试找到一种将计算行插入 SQL 查询的方法，该查询基于从单独的总数中减去的总和

例如：

Name | Title | eID | Spend_Category |Jan|Feb|...|Nov|Dec|Sum of Months|
Jay  |  CEO  | 1   | Lodging        |10 |20 |...| 0 |30 | 60          |
Jay  |  CEO  | 1   | Airlines       |20 |40 |...| 0 |60 | 120         |
Jay  |  CEO  | 1   | Auto           |10 |20 |...| 0 |30 | 60          |
Paul |  VP   | 2   | Lodging        |10 |20 |...| 0 |30 | 60          |

在单独的表格中，我有每个员工 ID 的总支出。 我想要做的是创建一个新行，并为每个用户（eID）创建一个新的“其他”Spend_Category，它总结了该用户的所有不同 Spend 并从总数中减去它。因此，如果 Jay 的总支出为 500 美元

例如：

Name | Title | eID | Spend_Category |Jan|Feb|...|Nov|Dec|Sum of Months|
Jay  |  CEO  | 1   | Lodging        |10 |20 |...| 0 |30 | 60          |
Jay  |  CEO  | 1   | Airlines       |20 |40 |...| 0 |60 | 120         |
Jay  |  CEO  | 1   | Auto           |10 |20 |...| 0 |30 | 60          |
Jay  |  CEO  | 1   | Other          |...................|$500-240=$260|
Paul |  VP   | 2   | Lodging        |10 |20 |...| 0 |30 | 60          |
...etc...

我当然对想法持开放态度，而且我对 SQL 很陌生。这是我目前所处的位置，我会感谢该小组的专业知识。

SELECT 
SC.Full_Name, 
TS.Job_Title,
TS.Card_Type,
SC.Employee_ID, 
SC.Genesis_Industry,
SC.May,
SC.June, 
SC.July, 
SC.August,
SC.September,
SC.October,
SC.November,
SC.December,
SC.January,
SC.February,
SC.March,
SC.April, 
(NZ(SC.May,0)+NZ(SC.June,0)+ NZ(SC.July,0)+ NZ(SC.August,0)+NZ(SC.September,0)+NZ(SC.October,0)+NZ(SC.November,0)+NZ(SC.December,0)+NZ(SC.January,0)+NZ(SC.February,0)+NZ(SC.March,0)+NZ(SC.April,0)) AS Category_Spend,
TS.Total_Spend
FROM Spend_Category SC
left join Top_Spender TS
on SC.Employee_ID=TS.Employee_ID

Answer 1

我创建了自己的快速表并写了一个简短的例子来说明如何做到这一点。但是，在处理这个问题时，我注意到，按照我写这篇文章的方式，您必须知道您想要哪些类别，因为那里有自己的订单项，然后将其他类别放入“其他”字段。

create table #test (firstname varchar(max), 
                category varchar(max), 
                jan int, feb int, mar int, apr int, may int, jun int, jul int, aug int, sep int, oct int, nov int, dec int)

insert into #test values
('Joe','Lodging',100,50,874,7852,50,50,6,0,0,0,0,0),
('Joe','Airlines',100,510,874,60,20,50,6,0,0,0,0,0),
('Joe','Auto',100,50,874,60,50,50,6,0,0,0,0,0),
('Joe','Lunch',500,50,874,60,50,50,6,0,0,500,0,0),
('Joe','Insurance',100,50,874,4111,50,50,6,0,0,0,0,0)

select 
    firstname, 
    Other = sum(case when category not in ('lodging','airlines','auto') 
                     then yearly else 0 end)
into #tbl
from #test t
cross apply (select yearly = isnull(jan,0) + isnull(feb,0) + 
    isnull(mar,0) + isnull(apr,0) + isnull(may,0) + isnull(jun,0) + 
    isnull(jul,0) + isnull(aug,0) + isnull(sep,0) + isnull(oct,0) + 
    isnull(nov,0) + isnull(dec,0)) y
group by firstname

select 
    t.firstname,
    category, 
    yearlyTotal

from #test t
cross apply (select yearlyTotal = isnull(jan,0) + isnull(feb,0) + 
    isnull(mar,0) + isnull(apr,0) + isnull(may,0) + isnull(jun,0) + 
    isnull(jul,0) + isnull(aug,0) + isnull(sep,0) + isnull(oct,0) + 
    isnull(nov,0) + isnull(dec,0)) y
where category in ('lodging','airlines','auto')

UNION 

select 
    firstname, 
    'Other' as Category, 
    other as yearlyTotal
from #tbl t