Question

我有一个表包含两种类型的信息，一种叫做Number_Of_Calls，另一种叫Number_Of_Answered。

现在，在我的应用程序中，我想知道Number_of_answered中Number_of_calls的百分比是多少，我认为在数据库中计算将是最好的方法。

但是我不知道如何在SQL中计算

到目前为止，我有：

Select Number_Of_Calls,
       Number_of_answered 
  from table 
 Where Date BETWEEN '2012-09-10' AND '2012-09-11'

Answer 1

select 
Number_of_Calls,
Number_of_Answered,
((Number_of_answered/Number_Of_Calls)*100) as answer_percent,
Date
from table Where Date BETWEEN '2012-09-10' AND '2012-09-11'

Answer 2

select 
Number_Of_Calls,
Number_of_answered
((Number_of_answered/Number_Of_Calls)*100.00) as percent
from table_name Where Date BETWEEN '2012-09-10' AND '2012-09-11'

计算SQL中的百分比

2 个答案: