每行将SQL中的总值相加

Question

In SQL Server 2014 I try to count a value per game per row like this:

Does anybody know if this is possible and how?

Answer 1

You can use a cumulative sum:

select [Order], Game, Points,
       sum(Points) over (partition by Game order by  [Order]) as CumePoints
from t;

You should avoid using reserved words and keywords for table or column names. In other words, Order is a bad name for a column name, because it needs to be escaped.

Answer 2

This is how i would have done it, if you would do it in T-SQL

if object_ID('tempdb..#Temp') IS NOT NULL drop table #Temp

create table #Temp (id int, Game nvarchar(100), Points int)

insert into #Temp (id, Game, Points)
values
(1, 'A', 1),
(2, 'A', 2),
(3, 'B', 5),
(4, 'B', 5),
(5, 'C', 4),
(6, 'C', 8)

select id, 
   Game, 
   Points, 
   SUM(Points) over (partition by Game order by id) 
from #Temp

Answer 3

An old solution for this is to use a query like this:

SELECT 
    t1.id, t1.Game, t1.Points, SUM(t2.Points) [Points (Add)]
FROM 
    yourTable t1 JOIN
    yourTable t2 ON t1.Game = t2.Game AND t1.id >= t2.id
GROUP BY 
    t1.id, t1.Game, t1.Points