求sql语句，实现显示的每条记录后面都加一列，显示其数量占总数的百分比

[iailp4728]

select type ,sum(value) as value  from (
select 'a'as type,1 as value
union all select 'a',2
union all select 'b',1
union all select 'b',3
union all select 'c',5  ) a
group by type
------------
type	value
a	3
b	4
c	5
------------
但是我想显示的是这样：
type	value	sum	bl
a	3	12	25%
b	4	12	33.3%
c	5	12	41.67%
请问如何实现

[开着拖拉机泡妞]

;with t
as(
select 'a'as type,1 as value
union all select 'a',2
union all select 'b',1
union all select 'b',3
union all select 'c',5  
)
select type,ltrim(SUM(value)*100.0/(select SUM(value) from t))+'%' as per from t
group by type
/*
-------------------------
type	per
a	25.000000000000%
b	33.333333333333%
c	41.666666666666%
-------------------------
*/

[iailp4728]

引用 1 楼 TravyLee 的回复:

;with t
as(
select 'a'as type,1 as value
union all select 'a',2
union all select 'b',1
union all select 'b',3
union all select 'c',5  
)
select type,ltrim(SUM(value)*100.0/(select SUM(value) from t))+'%' as per from t
group by type
/*
-------------------------
type	per
a	25.000000000000%
b	33.333333333333%
c	41.666666666666%
-------------------------
*/

现在的问题是，这个表实际上是我关联两个表查出来的，数据有点多。有没有方法只查询一次表得到结果

[开着拖拉机泡妞]

引用 2 楼 u012900934 的回复:

[quote=引用 1 楼 TravyLee 的回复:]

;with t
as(
select 'a'as type,1 as value
union all select 'a',2
union all select 'b',1
union all select 'b',3
union all select 'c',5  
)
select type,ltrim(SUM(value)*100.0/(select SUM(value) from t))+'%' as per from t
group by type
/*
-------------------------
type	per
a	25.000000000000%
b	33.333333333333%
c	41.666666666666%
-------------------------
*/

现在的问题是，这个表实际上是我关联两个表查出来的，数据有点多。有没有方法只查询一次表得到结果 [/quote] 你不能一次性把问题说完嘛？玩我们啊！把具体问题贴出来

[exception92]

with temp as(select * from Table11)
select Name,count(Name) 数量,CONVERT(decimal(18,2), COUNT(Name)*100.0/(select COUNT(Name) from temp)) 所占百分比 from temp group by Name,Content

[jiajiaren]

;with t
as(
select 'a'as type,1 as value
union all select 'a',2
union all select 'b',1
union all select 'b',3
union all select 'c',5  
)

SELECT  type,value,SumValue AS [sum],CONVERT(VARCHAR,ROUND(CONVERT(FLOAT,Value)/CONVERT(FLOAT,SumValue)*100,2))+'%' AS lr  FROM
(
SELECT  type,SUM(Value) Value,(SELECT SUM(value) FROM t) SumValue FROM t GROUP BY type

)a

 
 /*
 type value       sum         lr
---- ----------- ----------- -------------------------------
a    3           12          25%
b    4           12          33.33%
c    5           12          41.67%

(3 行受影响)

 */
 

[极品老土豆]

--在sqlserver2012 下有用的语句
select distinct type ,sum(a.value) over( partition by type )as value,sum(a.value) over() as rn
,cast(cast(sum(a.value) over( partition by type )*1.0/sum(a.value) over() *100 as decimal(9,2)) as varchar)+'%'
from (
select 'a'as type,1 as value
union all select 'a',2
union all select 'b',1
union all select 'b',3
union all select 'c',5  ) a



--结果展示
/*
type value       rn          
---- ----------- ----------- -------------------------------
a    3           12          25.00%
b    4           12          33.33%
c    5           12          41.67%

(3 行受影响)


*/

[iailp4728]

引用 6 楼 DBAXMMDS 的回复:

--在sqlserver2012 下有用的语句
select distinct type ,sum(a.value) over( partition by type )as value,sum(a.value) over() as rn
,cast(cast(sum(a.value) over( partition by type )*1.0/sum(a.value) over() *100 as decimal(9,2)) as varchar)+'%'
from (
select 'a'as type,1 as value
union all select 'a',2
union all select 'b',1
union all select 'b',3
union all select 'c',5  ) a



--结果展示
/*
type value       rn          
---- ----------- ----------- -------------------------------
a    3           12          25.00%
b    4           12          33.33%
c    5           12          41.67%

(3 行受影响)


*/

谢谢，虽然2000下不能运行，不过我试了下，在2008上能执行