是否有更快的替代方法来检查SQL语句中CASE语句中的SELECT语句是否为空？

Question

此案例陈述是否有更快的版本？

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

SELECT STATEMENT不会从第2行更改为第3行。

谢谢！

Answer 1

更快地输入...

isnull(statement, 0)

Answer 2

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