我们如何使用INNER JOIN创建MySQL视图?
为了说明使用INNER JOIN创建MySQL视图的方法,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,下面的查询将使用上述表上的INNER JOIN创建一个名为“ customer_V”的视图,该视图将具有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;mysql> Select * from customer_V;
+---------+
| Name |
+---------+
| Rahul |
| Yashpal |
| Gaurav |
+---------+
3 rows in set (0.02 sec)
以上是 我们如何使用INNER JOIN创建MySQL视图? 的全部内容, 来源链接: utcz.com/z/331381.html