如何從數據庫表中獲取結果？

Question

我有3個表：手機，phones_state和國家

電話：

+------------------+ 
| phone_id | model | 
+----------+-------+ 
| 1  | mot | 
| 2  | sam | 
+----------+-------+ 

phones_state：

+---------------------+ 
| phone_id | state_id | 
+----------+----------+ 
| 2  | 1  | 
| 2  | 3  | 
| 2  | 5  | 
| 1  | 1  | 
+----------+----------+ 

狀態：

+------------------+ 
| state_id | name | 
+----------+-------+ 
| 1  | rec | 
| 2  | notre | 
| 3  | res | 
| 4  | wait | 
| 5  | back | 
+----------+-------+ 

我想獲得處於狀態1而不處於狀態5的所有電話 如何在mysql查詢中執行此操作？

Answer 1

select p.phone_id 
from phones p 
inner join phones_state ps on ps.phone_id = p.phone_id 
group by p.phone_id 
having sum(ps.state_id = 1) >= 1 and sum(ps.state_id = 5) = 0