我如何在SQL Server中执行此操作? (我知道它不会按照书面形式运行,但它比我能解释的更能说明问题)
SELECT SQRT(number) WHERE number IN (4,9,16,25)
当然会返回多行
答案 0 :(得分:14)
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)
<强> sql fiddle demo 强>
答案 1 :(得分:0)
您可以创建派生表:
SELECT SQRT(number)
FROM (
SELECT 4 AS number
UNION ALL SELECT 9
UNION ALL SELECT 16
UNION ALL SELECT 25
) A