MySQL 如何创建不带列名的 MySQL 视图?
在创建视图时,提供列名列表是可选的。以下示例将说明如何创建不带列名的视图:
mysql> Select * from student_detail;
+-----------+-------------+------------+
| Studentid | StudentName | address |
+-----------+-------------+------------+
| 100 | Gaurav | Delhi |
| 101 | Raman | Shimla |
| 103 | Rahul | Jaipur |
| 104 | Ram | Chandigarh |
| 105 | Mohan | Chandigarh |
+-----------+-------------+------------+
5 rows in set (0.17 sec)
mysql> Create view View_student_detail AS SELECT * FROM Student_Detail;
Query OK, 0 rows affected (0.17 sec)
在下面的查询中,我们可以注意到在创建视图时没有给出任何列名,因此这是没有列名的视图。现在,如果我们使用视图的名称运行查询,则会从创建它的表中获取所有列。
mysql> Select * from View_student_detail;
+-----------+-------------+------------+
| Studentid | StudentName | address |
+-----------+-------------+------------+
| 100 | Gaurav | Delhi |
| 101 | Raman | Shimla |
| 103 | Rahul | Jaipur |
| 104 | Ram | Chandigarh |
| 105 | Mohan | Chandigarh |
+-----------+-------------+------------+
5 rows in set (0.00 sec)
阅读更多:MySQL 教程