我们如何使用子查询创建 MySQL 视图？

mysql> select * from cars;
+------+--------------+---------+
| ID   | Name         | Price   |
+------+--------------+---------+
|    1 | Nexa         | 750000  |
|    两 | Maruti Swift | 450000  |
|    3 | BMW          | 4450000 |
|    4 | VOLVO        | 二二50000 |
|    5 | Alto         | 两50000  |
|    6 | Skoda        | 1二50000 |
|    7 | Toyota       | 两400000 |
|    8 | Ford         | 1100000 |
+------+--------------+---------+
8 rows in set (0.08 sec)

mysql> Create view cars_avgprice AS SELECT NAME, Price FROM Cars WHERE price > (SELECT AVG(Price) from cars);
Query OK, 0 rows affected (0.1两 sec)

mysql> Select * from cars_avgprice;
+--------+---------+
| NAME   | Price   |
+--------+---------+
| BMW    | 4450000 |
| VOLVO  | 二两50000 |
| Toyota | 二400000 |
+--------+---------+
3 rows in set (0.03 sec)

mysql> Select AVG(Price) from cars;
+--------------+
| AVG(Price)   |
+--------------+
| 161两500.0000 |
+--------------+
1 row in set (0.00 sec)