Sql查询获取表中每列的不同条目的计数

Question

假设我有一个数据库中有60列的表。有人可以告诉我查询来获取表格每列（60）中所有不同条目的计数。

Cl1  Cl2 Cl3 
68722 No No No No No Yes Male No No 
68723 No Yes No No No Yes FeMale No No 
68725  No No No No Yes Male No No 

就像在上表假设我有10列（第1列至10列）

答案我想：

Cl2 No =2 , Blank=1 

Cl3 No=2, Yes =1 

等多达10

请给我一个Sql Server的查询。

Answer 1

UNPIVOT + GROUP BY和COUNT：

SELECT [Columns], 
     Case when [Values] = '' THEN 'Blank' ELSE [Values] END [Values], 
     COUNT(Id) as HowMany 
FROM (
    SELECT Id, 
      CAST(Cl1 as nvarchar(max)) as Cl1, 
      CAST(Cl2 as nvarchar(max)) as Cl2, 
      CAST(Cl3 as nvarchar(max)) as Cl3, 
      CAST(Cl4 as nvarchar(max)) as Cl4, 
      CAST(Cl5 as nvarchar(max)) as Cl5, 
      CAST(Cl6 as nvarchar(max)) as Cl6, 
      CAST(Cl7 as nvarchar(max)) as Cl7, 
      CAST(Cl8 as nvarchar(max)) as Cl8, 
      CAST(Cl9 as nvarchar(max)) as Cl9 
    FROM YourTable 
) as t 
UNPIVOT (
    [Values] FOR [Columns] IN (Cl1, Cl2, Cl3, Cl4, Cl5, Cl6, Cl7, Cl8, Cl9) 
) as unpvt 
GROUP BY [Columns], [Values] 
ORDER BY [Columns] 

输出：

你可以把这个在CTE和：

;WITH cte as (
    SELECT [Columns], 
      Case when [Values] = '' THEN 'Blank' ELSE [Values] END + '='+CAST(COUNT(Id) as nvarchar(max)) as HowMany 
    FROM (
     SELECT Id, 
       CAST(Cl1 as nvarchar(max)) as Cl1, 
       CAST(Cl2 as nvarchar(max)) as Cl2, 
       CAST(Cl3 as nvarchar(max)) as Cl3, 
       CAST(Cl4 as nvarchar(max)) as Cl4, 
       CAST(Cl5 as nvarchar(max)) as Cl5, 
       CAST(Cl6 as nvarchar(max)) as Cl6, 
       CAST(Cl7 as nvarchar(max)) as Cl7, 
       CAST(Cl8 as nvarchar(max)) as Cl8, 
       CAST(Cl9 as nvarchar(max)) as Cl9 
     FROM YourTable 
    ) as t 
    UNPIVOT (
     [Values] FOR [Columns] IN (Cl1, Cl2, Cl3, Cl4, Cl5, Cl6, Cl7, Cl8, Cl9) 
    ) as unpvt 
    GROUP BY [Columns], [Values] 
) 

SELECT DISTINCT 
      [Columns] +' '+  
      STUFF((
      SELECT ';'+HowMany 
      FROM cte 
      WHERE c.[Columns] = [Columns] 
      FOR XML PATH('') 
      ),1,1,'') as [Values] 
FROM cte c 

输出：

Values 
Cl1 Blank=1;No=2 
Cl2 No=2;Yes=1 
Cl3 No=3 
Cl4 No=3 
Cl5 No=3 
Cl6 Yes=3 
Cl7 FeMale=1;Male=2 
Cl8 No=3 
Cl9 No=3