我们如何使用 INNER JOIN 创建 MySQL 视图？

为了说明如何使用 INNER JOIN 制作 MySQL 视图，我们使用“Customers”和“Resreve”表中的以下数据 –

mysql> Select * from customers;
+-------------+----------+
| Customer_Id | Name     |
+-------------+----------+
| 1           | Rahul    |
| 2           | Yashpal  |
| 3           | Gaurav   |
| 4           | Virender |
+-------------+----------+
4 rows in set (0.00 sec)
mysql> Select * from reserve;
+------+------------+
| ID   | Day        |
+------+------------+
| 1    | 2017-12-30 |
| 2    | 2017-12-28 |
| 2    | 2017-12-25 |
| 1    | 2017-12-24 |
| 3    | 2017-12-26 |
+------+------------+
5 rows in set (0.00 sec)

现在，以下查询将在上述表上使用 INNER JOIN 创建一个名为“customer_V”的视图，该视图将包含预订一辆或多辆汽车的客户的姓名。

mysql> CREATE VIEW customer_V AS Select DISTINCT Name FROM customers c INNER JOIN Reserve R ON R.id = c.customer_id;
Query OK, 0 rows affected (0.08 sec)
mysql> Select * from customer_V;
+---------+
| Name    |
+---------+
| Rahul   |
| Yashpal |
| Gaurav  |
+---------+
3 rows in set (0.02 sec)