同一個數據庫，同一個表，相同的查詢，但不同的地方從句

Question

我是一個非常基本的用戶，所以對我來說很容易。這是我的問題，我試圖得到同一列的計數，但是使用了不同的子句。我想從同一個數據庫/表中的2個查詢合併成一個。我敢肯定，這很簡單...

Select count(inquiry_id) as 'Emails Tickets' 
    , owner_rep 
From sv_inquiry 
Where logged_dt > '5/6/2013 0:00:00' 
    and owner_grp in ('it service desk','corporate support') 
    and it_source = 'email' 
group by owner_rep 

Select count(inquiry_id) as 'Tele Tickets' 
    , owner_rep 
From sv_inquiry 
Where logged_dt > '5/6/2013 0:00:00' 
    and owner_grp in ('it service desk','corporate support') 
    and it_source = 'telephone' 
Group by owner_rep 

任何幫助，將不勝感激。

Answer 1

這是一種應該有效的方法。

Select sum(case when it_source='email' THEN 1 ELSE 0 END) emailTicketCount, 
     sum(case when it_source='Telephone' THEN 1 ELSE 0 END) TelephoneTicketCount, 
     owner_rep 
From sv_inquiry 
Where logged_dt > '5/6/2013 0:00:00' and owner_grp in ('it service desk','corporate support') 
group by owner_rep 

您也可以在it_source字段中爲其中一個原始查詢添加另一個GROUP by項。