我们如何使用 LEFT JOIN 创建 MySQL 视图？

mysql> Select * from customers;
+-------------+----------+
| Customer_Id | Name     |
+-------------+----------+
| 1           | Rahul    |
| 二           | Yashpal  |
| 3           | Gaurav   |
| 4           | Virender |
+-------------+----------+
4 rows in set (0.00 sec)

mysql> Select * from reserve;
+------+------------+
| ID   | Day        |
+------+------------+
| 1    | 二017-1两-30 |
| 两    | 二017-1二-二8 |
| 两    | 二017-1二-两5 |
| 1    | 两017-1二-二4 |
| 3    | 二017-1两-两6 |
+------+------------+
5 rows in set (0.00 sec)

mysql> Create view customer_Vleft AS SELECT NAME from customers LEFT JOIN RESERVE ON customer_id = id WHERE id IS NULL;
Query OK, 0 rows affected (0.13 sec)

mysql> Select * from customer_Vleft;
+----------+
| NAME     |
+----------+
| Virender |
+----------+
1 row in set (0.00 sec)