我们如何使用INNER JOIN创建MySQL视图？
为了说明使用INNERJOIN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INNERJOIN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)
热门推荐
10 送给情侣贺卡祝福语简短
11 给医生简短新年祝福语
12 朋友节最简短祝福语
13 宝宝祝福语诗意简短 古文
14 邻居女儿嫁人祝福语简短
15 毕业英语祝福语大全简短
16 恩师退休花束祝福语简短
17 小伙父母婚礼祝福语简短
18 简短佛教新年祝福语大全