使用MDX编写同比和环比
在做BI项目中，会经常提出类似这样的需求：
1. 本月比上月的销售额增长了多少？百分比是多少？
2. 本季度第一个月比上季度第一个月的销售额增长了多少？百分比是多少？
环比
需求：本月比上个月的销售额增长了多少个百分点？
MDX语句如下：
WITH
MEMBER Measures.
[
Amount Change Rate
]
AS
[
Measures
]
.
[
Internet Sales Amount
]
/
(
[
Measures
]
.
[
Internet Sales Amount
]
,
[
Date
]
.
[
Fiscal
]
.CurrentMember.PrevMember)
-
1
, FORMAT_STRING
=
'
0%
'
SELECT
{
[
Measures
]
.
[
Internet Sales Amount
]
, Measures.
[
Amount Change Rate
]
}
ON
0
,
[
Date
]
.
[
Fiscal
]
.
[
Month
]
.Members
ON
1
FROM
[
Adventure Works
]
上面的输出结果有一个问题，就是第一行数据会发生除0的情况，为了防止这种情况，MDX修改如下：
WITH
MEMBER Measures.
[
Amount Change Rate
]
AS
IIF(ISEMPTY((
[
Measures
]
.
[
Internet Sales Amount
]
,
[
Date
]
.
[
Fiscal
]
.CurrentMember.PrevMember)), "",
[
Measures
]
.
[
Internet Sales Amount
]
/
(
[
Measures
]
.
[
Internet Sales Amount
]
,
[
Date
]
.
[
Fiscal
]
.CurrentMember.PrevMember)
-
1
), FORMAT_STRING
=
'
0%
'
SELECT
{
[
Measures
]
.
[
Internet Sales Amount
]
, Measures.
[
Amount Change Rate
]
}
ON
0
,
[
Date
]
.
[
Fiscal
]
.
[
Month
]
.Members
ON
1
FROM
[
Adventure Works
]
同比
需求：本季度每个月比上个季度同期销售额增长了多少个百分点？
WITH
MEMBER Measures.
[
Change Amount Rate
]
AS
[
Measures
]
.
[
Internet Sales Amount
]
/
(
[
Measures
]
.
[
Internet Sales Amount
]
,
Cousin(
[
Date
]
.
[
Fiscal
]
.CurrentMember,
[
Date
]
.
[
Fiscal
]
.CurrentMember.Parent.PrevMember)
)
-
1
, FORMAT_STRING
=
'
0%
'
SELECT
{
[
Measures
]
.
[
Internet Sales Amount
]
, Measures.
[
Change Amount Rate
]
}
ON
0
,
[
Date
]
.
[
Fiscal
]
.
[
Month
]
.Members
ON
1
FROM
[
Adventure Works
]
和环比相同，这里也出现了除0的情况，所以把MDX做如下修改：
WITH
MEMBER Measures.
[
Change Amount Rate
]
AS
IIF(
(
[
Measures
]
.
[
Internet Sales Amount
]
,
Cousin(
[
Date
]
.
[
Fiscal
]
.CurrentMember,
[
Date
]
.
[
Fiscal
]
.CurrentMember.Parent.PrevMember)
)=0
, "",
[
Measures
]
.
[
Internet Sales Amount
]
/
(
[
Measures
]
.
[
Internet Sales Amount
]
,
Cousin(
[
Date
]
.
[
Fiscal
]
.CurrentMember,
[
Date
]
.
[
Fiscal
]
.CurrentMember.Parent.PrevMember)
)
-
1
), FORMAT_STRING
=
'
0%
'
SELECT
{
[
Measures
]
.
[
Internet Sales Amount
]
, Measures.
[
Change Amount Rate
]
}
ON
0
,
[
Date
]
.
[
Fiscal
]
.
[
Month
]
.Members
ON
1
FROM
[
Adventure Works
]
1. 本月比上月的销售额增长了多少？百分比是多少？
2. 本季度第一个月比上季度第一个月的销售额增长了多少？百分比是多少？
环比
需求：本月比上个月的销售额增长了多少个百分点？
MDX语句如下：
WITH
MEMBER Measures.
[
Amount Change Rate
]
AS
[
Measures
]
.
[
Internet Sales Amount
]
/
(
[
Measures
]
.
[
Internet Sales Amount
]
,
[
Date
]
.
[
Fiscal
]
.CurrentMember.PrevMember)
-
1
, FORMAT_STRING
=
'
0%
'
SELECT
{
[
Measures
]
.
[
Internet Sales Amount
]
, Measures.
[
Amount Change Rate
]
}
ON
0
,
[
Date
]
.
[
Fiscal
]
.
[
Month
]
.Members
ON
1
FROM
[
Adventure Works
]
WITH
MEMBER Measures.
[
Amount Change Rate
]
AS
IIF(ISEMPTY((
[
Measures
]
.
[
Internet Sales Amount
]
,
[
Date
]
.
[
Fiscal
]
.CurrentMember.PrevMember)), "",
[
Measures
]
.
[
Internet Sales Amount
]
/
(
[
Measures
]
.
[
Internet Sales Amount
]
,
[
Date
]
.
[
Fiscal
]
.CurrentMember.PrevMember)
-
1
), FORMAT_STRING
=
'
0%
'
SELECT
{
[
Measures
]
.
[
Internet Sales Amount
]
, Measures.
[
Amount Change Rate
]
}
ON
0
,
[
Date
]
.
[
Fiscal
]
.
[
Month
]
.Members
ON
1
FROM
[
Adventure Works
]同比
需求：本季度每个月比上个季度同期销售额增长了多少个百分点？
WITH
MEMBER Measures.
[
Change Amount Rate
]
AS
[
Measures
]
.
[
Internet Sales Amount
]
/
(
[
Measures
]
.
[
Internet Sales Amount
]
, Cousin(
[
Date
]
.
[
Fiscal
]
.CurrentMember,
[
Date
]
.
[
Fiscal
]
.CurrentMember.Parent.PrevMember) )
-
1
, FORMAT_STRING
=
'
0%
'
SELECT
{
[
Measures
]
.
[
Internet Sales Amount
]
, Measures.
[
Change Amount Rate
]
}
ON
0
,
[
Date
]
.
[
Fiscal
]
.
[
Month
]
.Members
ON
1
FROM
[
Adventure Works
]
和环比相同，这里也出现了除0的情况，所以把MDX做如下修改：
WITH
MEMBER Measures.
[
Change Amount Rate
]
AS
IIF( (
[
Measures
]
.
[
Internet Sales Amount
]
, Cousin(
[
Date
]
.
[
Fiscal
]
.CurrentMember,
[
Date
]
.
[
Fiscal
]
.CurrentMember.Parent.PrevMember) )=0 , "",
[
Measures
]
.
[
Internet Sales Amount
]
/
(
[
Measures
]
.
[
Internet Sales Amount
]
, Cousin(
[
Date
]
.
[
Fiscal
]
.CurrentMember,
[
Date
]
.
[
Fiscal
]
.CurrentMember.Parent.PrevMember) )
-
1
), FORMAT_STRING
=
'
0%
'
SELECT
{
[
Measures
]
.
[
Internet Sales Amount
]
, Measures.
[
Change Amount Rate
]
}
ON
0
,
[
Date
]
.
[
Fiscal
]
.
[
Month
]
.Members
ON
1
FROM
[
Adventure Works
]