在 SQL 中处理多个硬编码值的最简单方法?

How would I do this in SQL Server? (I know it won't run as written but it illustrates the question better than I can explain)

SELECT SQRT(number) WHERE number IN (4,9,16,25)

当然会返回多行

推荐答案

您可以使用 表值构造器

select sqrt(number) 
from (
    values (4),(9),(16),(25)
) as T(number)

或使用 union all

select sqrt(number)
from (
    select 4 union all
    select 9 union all
    select 16 union all
    select 25
) as T(number)

sql 小提琴演示