Tạo view dùng INNER JOIN. Bảng Customers và Reserve:
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)
Tạo view customer_V lấy khách đã đặt chỗ (INNER JOIN, DISTINCT):
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)