選擇加入

Question

這些都是表：dbo.application，dbo.action，dbo.ogpo_dept和dbo.employees

| ID | dept_id | action | premium | | ID | Name  |  
------------------------------------ -----------------  
| 1 | 5  | 21  | 61446 | | 21 | Stiker |  
| 2 | 11  | 18  | 325  | | 18 | One Super| 
| 3 | 5  | null | 224  | 
| 4 | 11  | 18  | 262  | 

| ID | Name    |   | ID | FullName | dept_id | 
---------------------------   --------------------------- 
| 5 | Sales Dep   |   | 1 | Mike  | 5  | 
| 11 | HR Dep    |   | 2 | Ronaldo | 11  | 

我的查詢：

select od.name as dept_name, 
     e.Fullname, 
     oac.name, 
     COUNT(oa.id) as total, 
     SUM(oa.premium) as premSum 
from dbo.ogpo_dept od 
    inner join dbo.employees e on e.dept_id = od.id 
    left join dbo.application oa on oa.dept_id = od.id 
    left join dbo.action oac on oac.id = oa.[action] 
group by dept_name, e.Fullname, oac.name, oa.[action] 

查詢執行很長一段時間（沒有按完成）。

我試過了，如果要刪除SUM (premium) as premSum那就執行了。

我想收到這樣的結果：

| Dept_name | FullName | Name  | total | premium | 
----------------------------------------------------- 
| Sales Dep | Mike  |One Super |68  | 40210 | 
| HR Dep | Ronaldo |NULL  | 0  | Null | 

Answer 1

SELECT od.NAME AS dept_name 
    ,e.Fullname 
    ,oac.NAME 
    ,COUNT(oa.id) AS total 
    ,SUM(oa.premium) AS premSum 
FROM dbo.ogpo_dept WITH (NOLOCK) od 
INNER JOIN dbo.employees WITH (NOLOCK) e ON e.dept_id = od.id 
LEFT JOIN dbo.application WITH (NOLOCK) oa ON oa.dept_id = od.id 
LEFT JOIN dbo.action WITH (NOLOCK) oac ON oac.id = oa.[action] 
GROUP BY dept_name 
    ,e.Fullname 
    ,oac.NAME 
    ,oa.[action]