我在 Postgres 中有一个查询:
select gender, avg(x) from db where degree = 'NO' group by gender order by gender
由于 x 列中的某些数据为 NaN。分组结果如下:
'Female','0.12107496463932107496'
'Male','0.09531828898619063658'
null,'0.10851773264625644135'
如何排除最后一行?零?
最佳答案
添加条件性别不为空
select gender, avg(x)
from db where degree = 'NO' and gender is not null
group by gender order by gender
关于sql - PostgreSQL 删除组上的 null,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/58723736/