如果我有這樣一個表作爲COUNT場
Name Email
Sam [email protected]
Fred [email protected]
Ben Null
Tom Null
,我想指望有多少人沒有電子郵件
,所以我想
SELECT
Name,
Email,
CASE WHEN Email IS NULL
THEN COUNT(Email) ELSE 0 END AS [Count]
FROM Table1
Group by Name,Email
但我得到的結果是
Name Email Count
Sam [email protected] 0
Fred [email protected] 0
Ben Null 0
Tom Null 0
我不認爲這回答了這個問題。 – Spongman