所以,觉得有必要记录下来,这样以后再次碰到这类问题,也能从中获取解答的思路。
求教:我有个表有入库时间,有出库时间,我想得到该样式号每月的销售和历史库存
http://bbs.csdn.net/topics/390629790
库结构大概是这样:
货号 样式号 入库时间 出库时间
a001 10 2011-1-10
b002 10 2011-1-10 2011-2-1
c003 10 2012-1-15 2012-2-2
d004 10 2013-2-3 2013-1-5
e005 10 2013-2-3
f006 15 2011-2-15 2011-3-16
g007 15 2011-2-16 2012-3-16
h009 15 2013-1-10
m012 18 2011-1-4
c009 18 2011-4-5 2012-5-6
f008 18 2012-2-19 2013-1-1
e008 18 2013-1-5 2013-2-6
我想得到的结果:
样式号 日期 销售件数 库存件数
10 2011-2 1 1
10 2012-2 1 1
10 2013-1 1 2
15 2011-3 1 0
15 2012-3 1 1
18 2012-5 1 1
18 2013-1 1 1
18 2013-2 1 1
我的解法:
-
if object_id('tb') is not null
-
drop
table tb
-
go
-
-
create
table tb
-
(
-
[货号]
varchar(
20),[样式号]
int,
-
[入库时间] datetime,
-
[出库时间] datetime
-
)
-
-
insert
into tb
-
SELECT
'a001',
10,
'2011-01-10',
null
UNION ALL
-
SELECT
'b002',
10,
'2011-01-10',
'2011-02-01'
UNION ALL
-
SELECT
'c003',
10,
'2012-01-15',
'2012-02-02'
UNION ALL
-
SELECT
'd004',
10,
'2013-01-03',
'2013-01-05'
UNION ALL
-
SELECT
'e005',
10,
'2013-01-03',
null
UNION ALL
-
SELECT
'f006',
15,
'2011-02-15',
'2011-03-16'
UNION ALL
-
SELECT
'g007',
15,
'2011-02-16',
'2012-03-16'
UNION ALL
-
SELECT
'h009',
15,
'2013-01-10',
null
UNION ALL
-
SELECT
'm012',
18,
'2011-01-04',
null
UNION ALL
-
SELECT
'c009',
18,
'2011-04-05',
'2012-05-06'
UNION ALL
-
SELECT
'f008',
18,
'2012-02-19',
'2013-01-01'
UNION ALL
-
SELECT
'e008',
18,
'2013-01-05',
'2013-02-06'
-
go
-
-
-
;with t
-
as(
-
select *,
-
row_number()
over(
partition
by 样式号
-
order
by 入库时间,出库时间)
as
rownum
-
from tb
-
),
-
-
tt
-
as
-
(
-
select *,
-
case
when 出库时间
is
null
-
then (
select top
1 出库时间
-
from t t2
-
where t1.样式号 = t2.样式号
and
-
t1.rownum > t2.rownum
-
order
by t2.rownum
desc)
-
else 出库时间
-
end
as prior_row,
-
-
case
when 出库时间
is
null
-
then (
select top
1 出库时间
-
from t t2
-
where t1.样式号 = t2.样式号
and
-
t1.rownum < t2.rownum
-
order
by t2.rownum )
-
else 出库时间
-
end
as next_row
-
-
from t t1
-
),
-
-
ttt
-
as
-
(
-
select 样式号,
-
convert(
varchar(
7),
isnull(next_row,prior_row),
120)
as 日期,
-
count(出库时间) 销售件数,
-
count(入库时间) 库存件数,
-
count(入库时间) -
count(出库时间) 剩余库存
-
--row_number() over(partition by 样式号
-
--order by convert(varchar(7),isnull(next_row,prior_row),120)) as rownum
-
from tt
-
group
by 样式号,
-
convert(
varchar(
7),
isnull(next_row,prior_row),
120)
-
-
)
-
-
select t1.样式号,t1.日期,
-
isnull(t1.销售件数,
0)
as 销售件数 ,
-
-
isnull(t1.库存件数,
0) +
-
isnull((
select
sum(库存件数)-
sum(销售件数)
as 剩余库存
from ttt t2
-
where t2.样式号 = t1.样式号
-
and t2.日期 < t1.日期
-
),
0) -
-
isnull(t1.销售件数,
0)
as 库存件数
-
-
from ttt t1
-
order
by t1.样式号
-
/*
-
样式号 日期 销售件数 库存件数
-
10 2011-02 1 1
-
10 2012-02 1 1
-
10 2013-01 1 2
-
15 2011-03 1 0
-
15 2012-03 1 1
-
18 2012-05 1 1
-
18 2013-01 1 1
-
18 2013-02 1 1
-
*/