在同一个sql查询中使用别名

Question

我有这个SQL查询：

select GEN_source, count(*) as count, sum(100) / total as percentage
from tics
cross join (select count(*) as total from t_cs) x
group by 1

如何在同一查询中使用创建的别名添加order by count ASC？

感谢。

Answer 1

Count是一个保留字，因此需要将其封装在背景上或更改名称

select GEN_source, count(*) as `count`, sum(100) / total as percentage
from tics
cross join (select count(*) as total from t_cs) x
group by 1
ORDER By `count`

或

select GEN_source, count(*) as cnt, sum(100) / total as percentage
from tics
cross join (select count(*) as total from t_cs) x
group by 1
ORDER By cnt