为了说明如何使用 RIGHT JOIN 创建 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,以下查询将使用上述表上的 RIGHT JOIN 创建一个名为“customer_VRight”的视图,其中包含尚未预订任何汽车的客户的姓名。
mysql> Create view customer_VRight AS SELECT NAME from Reserve RIGHT JOIN customers ON customer_id = id WHERE id IS NULL; Query OK, 0 rows affected (0.08 sec) mysql> Select * from customer_VRight; +----------+ | NAME | +----------+ | Virender | +----------+ 1 row in set (0.00 sec)
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