Question

我想返回关于JOBID的效率，但是当它更改下面的查询以在mysql工作台中检查它时它不起作用。所需的查询无效。

实际查询：

select 'Efficiency' Field, avg(eff),min(eff),max(eff) 
from (
    select (Job_Render/(LC_Final+LC_Preview))as eff 
    from ras
)as s;

所需查询：

select JobID 
from (
  select 'Efficiency' Field,avg(eff),min(eff),max(eff) as f 
  from (
     select (Job_Render/(LC_Final+LC_Preview))as eff 
     from ras
  )
) as s;

Answer 1

首先，您需要派生表的表别名：

select JobID 
from (select 'Efficiency' as Field, avg(eff), min(eff), max(eff) as f 
      from (select (Job_Render/(LC_Final+LC_Preview))as eff 
            from ras
           ) s
    ) s;

如果要选择它，还需要一个名为JobID的列别名。

可以想象，您可能只想按JobId汇总：

select JobId, 'Efficiency' as Field, avg(eff), min(eff), max(eff) as f 
from (select ras.*, (Job_Render/(LC_Final+LC_Preview))as eff 
      from ras
     ) s
group by JobId;

我想在查询中添加JOBID

1 个答案: