內容爲特定列數的內容計數行

Question

我無法弄清楚如何創建一列與其他列的內容的行數。 沒有對所有列（*）計數

------------------------- Output should be (NO COLUMN D): --------- 
| A | B | C | D |          | Count | 
-------------------------          --------- 
| foo | foo | foo | foo |          | 9 | 
-------------------------          --------- 
| bar | bar | bar | bar | 
------------------------- 
| x | x |  | x | 
------------------------- 
| y |  |  | y | 
------------------------- 

我已經試過許多方法，如：

• SELECT SUM(COUNT(A) + Count(B) + COUNT(C)) from SomeTable
• SELECT COUNT(A + B + C)
• SELECT COUNT(A,B,C)

我可以」找到正確的語法。有人能幫我解決這個問題嗎？

Answer 1

SELECT SUM(CASE WHEN A IS NULL THEN 0 ELSE 1 END) 
    + SUM(CASE WHEN B IS NULL THEN 0 ELSE 1 END) 
    + SUM(CASE WHEN C IS NULL THEN 0 ELSE 1 END) 
    AS [TOTAL] 
FROM dbo.SomeTable 

Demo

Answer 2

遇到同樣的錯誤昨天。這是我解決它的方式。

Select Count(sum) from 
(select 
count(A) as sum 
from sometable 
where ISNULL(A,'')<>'' 
,select 
count(B) as sum 
from sometable 
where ISNULL(B,'')<>'' 
,select 
count(C) as sum 
from sometable 
where ISNULL(C,'')<>'' 
)t