如何在teradata sql助手中使用cast和case

Question

我需要将col代理转换为小整数和nee以带来col代理的绝对值。 我知道如何分开但不在一起。

select     
cast (a.AGENT as smallint) as agent,
abs (a.AGENT)
from Table

Answer 1

您需要重复cast()，我认为：

select cast(a.AGENT as smallint) as agent, abs(cast(a.AGENT as smallint))
from Table;

Answer 2

这将返回一列：

abs(cast (a.AGENT as smallint)) as agent