使用視圖
===
## 知識點
```
create view ... 創建視圖
drop view ... 刪除視圖
```
## 實戰
```
> select u.player,t.content from users as u,twitters as t where u.id - t.user_id and u.id = 1
> create view curray_twitters as (sql語句) // 創建視圖
> select * from curry_twitters;
> drop view curry_twitters; // 刪除視圖
```
