SQL查詢來獲取這似乎是最每個類別

Question

值我有一個這樣的表：

Category Reply 
---------+---------------+ 
M    1     
F    2     
M    1     
M    3    
M    1     
M    3     
F    2     
F    1     
F    2    
F    5 
F    2 

---

我正在尋找一個SQL查詢返回的結果如下：

Category Total Number Best Reply   Number 
---------+---------------+------------------+---------------+ 
M    5     1     3 
F    6     2     4 

總數：該類別的出現次數（我知道如何得到這個）

最佳回覆：這是個選擇的批覆Ë最該類別

號碼：「最好的回覆」被選爲

Answer 1

你不指定數據庫的時間數，所以我避免使用通用表格表達式可以使這個更清晰。它仍然可以清理一下。我做了我的SQL Server上工作2008

select rsTotalRepliesByCategory.Category, 
     TotalRepliesByCategory, 
     rsCategoryReplyCount.Reply, 
     rsMaxReplies.MaxReplies 
from 
(
    --calc total replies 
    select Category, COUNT(*) as TotalRepliesByCategory 
    from CategoryReply 
    group by Category 
) rsTotalRepliesByCategory 
INNER JOIN 
(
    --calc number of replies by category and reply 
    select Category, Reply, COUNT(*) as CategoryReplyCount 
    from CategoryReply 
    group by Category, Reply 
) rsCategoryReplyCount on rsCategoryReplyCount.Category = rsTotalRepliesByCategory.Category 
INNER JOIN 
(
    --calc the max replies 
    select Category, MAX(CategoryReplyCount) as MaxReplies 
    from 
    (
     select Category, Reply, COUNT(*) as CategoryReplyCount 
     from CategoryReply 
     group by Category, Reply 
    ) rsCategoryReplyCount2 
    group by Category 
) rsMaxReplies on rsMaxReplies.Category = rsTotalRepliesByCategory.Category and rsMaxReplies.MaxReplies = rsCategoryReplyCount.CategoryReplyCount 

這裏是我以前玩的這個設置：

create table CategoryReply 
(
    Category char(1), 
    Reply int 
) 

insert into CategoryReply values ('M',1) 
insert into CategoryReply values ('F',2) 
insert into CategoryReply values ('M',1) 
insert into CategoryReply values ('M',3) 
insert into CategoryReply values ('M',1) 
insert into CategoryReply values ('M',3) 
insert into CategoryReply values ('F',2) 
insert into CategoryReply values ('F',1)     
insert into CategoryReply values ('F',2) 
insert into CategoryReply values ('F',5) 
insert into CategoryReply values ('F',2) 

最後，輸出：

Category TotalRepliesByCategory Reply MaxReplies 
F 6 2 4 
M 5 1 3 

Answer 2

SELECT Category, TotalNumber, Row_Number() over (order by TotalNumber) 
FROM(

    SELECT Category, Sum(Reply) as TotalNumber, Count(Reply) as Number 
    From Table 
    Group By Category) as temp 

將是類似的東西