有沒有更快的選擇來檢查SELECT語句在SQL Server的CASE語句中是否爲空？

Question

這個case語句有更快的版本嗎？

CASE 
WHEN (SELECT STATEMENT) IS NOT NULL 
THEN (SELECT STATEMENT) 
ELSE 0 
END AS [Variable Name] 

凡SELECT STATEMENT不從2號線更改爲3行

謝謝！

Answer 1

更快的輸入...

isnull(statement, 0) 

Answer 2

WITH cte 
AS 
(
    SELECT co11 
    FROM ... 
) 
SELECT ISNULL(cte.col1, 0) as [Variable Name] 
FROM cte