那么如何通过计算在表上添加一列

Question

我做了一个查询，结果如下：

select claim_by, count(*) as total_response, 
       count (response_time > minute (response_time -30)) as total_target,
       count(response_time > minute (response_time +30)) as total_untarget,
       (COUNT(claim_by)/alltotal) * 100 AS percentage_total_response
from itcorp_first_response,
     (SELECT COUNT(claim_by) AS alltotal 
      FROM itcorp_first_response) AS alltotal
GROUP BY claim_by;

那么如何在查询中添加一个计算 total_target/total_response * 100 的列..？

Answer 1

尝试子查询

select *,(total_target/total_response) as [total_target/total_response] from
(
select 
claim_by, 
count(*) as total_response, 
       count (response_time > minute (response_time -30)) as total_target,
       count(response_time > minute (response_time +30)) as total_untarget,
       (COUNT(claim_by)/alltotal) * 100 AS percentage_total_response
from itcorp_first_response,
     (SELECT COUNT(claim_by) AS alltotal 
      FROM itcorp_first_response) AS alltotal
GROUP BY claim_by
)XX

Answer 2

你只需要写出来：

select claim_by, count(*) as total_response, 
       count (response_time > minute (response_time -30)) as total_target,
       count(response_time > minute (response_time +30)) as total_untarget,
       (COUNT(claim_by)/alltotal) * 100 AS percentage_total_response,
       count (response_time > minute (response_time -30)) / count(*) *100
from itcorp_first_response,
     (SELECT COUNT(claim_by) AS alltotal 
      FROM itcorp_first_response) AS alltotal
GROUP BY claim_by;