試圖在SQL中獲取每天的價值的平均值

Question

我試圖獲得平均每天發佈的工作數量，無法從本網站上提出的任何類似的在先問題中找出結果。這看起來很基本，但由於某種原因，它不起作用。有人可以幫忙嗎？謝謝！

select avg(count(*) 
from select (count(*), to_char(thedate, 'MM/DD/YYYY') as date 
    from jobs where companyid = 1) 

Answer 1

試試這個：

select avg(jobNumber), date 
from select (count(*) as jobNumber, to_char(thedate, 'MM/DD/YYYY') as date 
from jobs 
where companyid = 1 
Group by to_char(thedate, 'MM/DD/YYYY') 
) innerSelect 
Group by date