按计算列排序

如果要对计算列排序，可以为计算列指定别名，然后按别名排序。

创建测试用表：

CREATE OR REPLACE VIEW v AS
SELECT 3 AS a, 4 AS b FROM DUAL
UNION ALL
SELECT 2 AS a, 3 AS b FROM DUAL
UNION ALL
SELECT 1 AS a, 2 AS b FROM DUAL;
SELECT * FROM v;

sql代码如下：

SELECT a, b, a * b AS c FROM v ORDER BY c;

执行结果如下：

由此可见：只要能将数据查询出来，就能根据相应的信息排序。