SQL语句里的值能不能暂时保存着，以便下面的值要用？解决方法

SQL语句里的值能不能暂时保存着，以便下面的值要用？
select t.value+t.value1 as v
from table t

比如上面的语句，我先要计算value+value1的和，然后下面又要用到这个和，再下面又要用到上面那个值的和。
不会只能下面重新累加上面的和吧？

[解决办法]

SQL code

with t1 as (select 1+2 var1 from dual),t2 as (select var1 from t1)select var1 from t2;-------------或者--------------------with t1 as (select 1+2 var1 from dual),t2 as (select (select var1 from t1) v1 from dual)select v1 from t2;
[解决办法]
select s.v m from (select t.yw_ly_id+t.yw_ly_id v from s_business_domain t) s
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