查找NoOfComments的百分比

Question

Id Answer NoOfComments 
18  1  2 
19  2  0 
20  3  0 
21  4  0 
22  5  1 

上面给出的数据是从以下StoredProcedure获得的输出。

ALTER PROCEDURE [dbo].[BlogAnswerByQuestionId] 
(
    @QuestionId int 
) 
AS 
BEGIN 
    SELECT [HRM_BlogAnswer].[Id] as Id 
      ,[HRM_BlogAnswer].[Answer] 
      ,(SELECT COUNT(*) FROM HRM_BlogVote WHERE HRM_BlogVote.AnswerId =[HRM_BlogAnswer] .[Id]) AS NoOfComments 

     FROM [HRM_BlogAnswer] 
    WHERE [HRM_BlogAnswer].[QuestionId] = @QuestionId 


END 

现在我需要根据现场NoOfComments值来找到每个答案的百分比值。我可以提供更多信息。 1.表HRM_blogquestion中的数据如下。在表HRM_Bloganswer

Id Question CreatedDate   CreatedBy 
8 tttt 2012-07-03 17:36:47.513  1 

2.datas如下表HRM_Blogvote

Id QuestionId Answer 
18 8    1 
19 8    2 
20 8    3 
21 8    4 
22 8    5 

3.datas如下

Id QuestionId AnswerId EmployeeId 
19 8    18  1 
23 8    22  24 
24 8    18  25 

从这些表DATAS我写上面的SP，现在我需要找到投票答案的百分比

请帮我解决这个问题。

Answer 1

而不是创建此表@Results，您可以将您现有的查询变成common table expression，并代之以查询。最终的查询你想要的：

declare @Results table (
    Id int not null, 
    Answer int not null, 
    NoOfComments int not null 
) 
insert into @Results (Id,Answer,NoOfComments) values 
(18,  1,  2), 
(19,  2,  0), 
(20,  3,  0), 
(21,  4,  0), 
(22,  5,  1) 

select *,((NoOfComments * 100.0)/SUM(NoOfComments) OVER (PARTITION BY (1))) as Pcnt 
from @Results 

结果：

Id   Answer  NoOfComments Pcnt 
----------- ----------- ------------ --------------------------------------- 
18   1   2   66.666666666666 
19   2   0   0.000000000000 
20   3   0   0.000000000000 
21   4   0   0.000000000000 
22   5   1   33.333333333333 

---

所以，你的PROC是：

ALTER PROCEDURE [dbo].[BlogAnswerByQuestionId] 
(
    @QuestionId int 
) 
AS 
BEGIN 
    ;With Results as (
    SELECT [HRM_BlogAnswer].[Id] as Id 
      ,[HRM_BlogAnswer].[Answer] 
      ,(SELECT COUNT(*) FROM HRM_BlogVote WHERE HRM_BlogVote.AnswerId =[HRM_BlogAnswer] .[Id]) AS NoOfComments 

     FROM [HRM_BlogAnswer] 
    WHERE [HRM_BlogAnswer].[QuestionId] = @QuestionId 
    ) 
    select *,((NoOfComments * 100.0)/SUM(NoOfComments) OVER (PARTITION BY (1))) as Pcnt 
    from Results 

END 

Answer 2

ALTER PROCEDURE [dbo].[BlogAnswerByQuestionId] 
(  
@QuestionId int 
) 
AS 
BEGIN  
WITH Results 
AS 
    (  
     SELECT [HRM_BlogAnswer].[Id] as Id   
       ,[HRM_BlogAnswer].[Answer]   
       ,(SELECT COUNT(*) FROM [HRM_BlogVote] WHERE [HRM_BlogVote].[AnswerId] =[HRM_BlogAnswer].[Id]) AS NoOfComments   
      FROM [HRM_BlogAnswer]  
     WHERE [HRM_BlogAnswer].[QuestionId] = @QuestionId  
    )  
     SELECT *, 
     case when NoOfComments>0 then ((NoOfComments * 100.0)/SUM(NoOfComments) OVER (PARTITION BY (1))) else 0 end as Percentage  
      FROM Results 
END