我有以下选择声明:
select [Fiscal Year], sum([value]),
YEAR(DATEADD(year,-1,[Fiscal Year])) as previous_year
from [table1]
group by [Fiscal Year]
如何在上一年的previous_year
,sum([value])
列之后添加?
答案 0 :(得分:1)
请尝试以下查询SQL 2008
select t1.[Fiscal Year],t1.Value,(t1.[Fiscal Year]-1) [previous_year],t2.Value [previous_value]
from
( select [Fiscal Year], sum([value]) value
from [table1]
group by [Fiscal Year]
)t1
LEFT JOIN
(
select [Fiscal Year], sum([value]) value
from [table1]
group by [Fiscal Year]
)t2
ON t1.[Fiscal Year]=t2.[Fiscal Year]+1
答案 1 :(得分:0)
如果您使用的是SQL Server 2012+,则可以使用LAG
获取上一行的值:
;with cte as (
select [Fiscal Year], sum([value]) AS value,
from [table1]
group by [Fiscal Year]
)
select [Fiscal Year], value,
[Fiscal Year] - 1, lag(value) over (order by [Fiscal Year]) as prev_value
from cte
答案 2 :(得分:0)
--to prepare the environment, let said this is your table
declare @table table
(
fiscalYr integer,
Value integer,
previousyr integer,
prevValue integer
)
--to prepare the value, let said these are your value
insert into @table values (2014,165,2013,0);
insert into @table values (2015,179,2014,0);
insert into @table values (2016,143,2015,0);
--the SQL
select A.fiscalYr,A.Value,A.previousyr, B.Value
from @table A left join
@table B on B.fiscalYr = A.previousyr
这是我得到的答案
fiscalYr |值| PrevYr |值
2014 | 165 | 2013 | NULL
2015 | 179 | 2014 | 165
2016 | 143 | 2015年| 179