大神们，帮我看看
我创建一个视图，在视图里用union怎么报错啊！语句为：
CREATE VIEW mainview(MID) 
  AS
((SELECT ID FROM student)
  UNION (SELECT ID FROM teacher));
错误信息为：ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'UNION
 (SELECT ID FROM teacher))' at line 4

student.ID和teacher.ID 没问题的。这是什么情况啊！我mysql服务器是：mysql-connector-net-6.4.4.msi!
请大侠们帮忙啊！

------解决方案--------------------
试一下这个，另外你的MYSQL版本是多少？

 create view mainview 
 as 
 select SELECT ID FROM student
 union 
 SELECT ID FROM teacher
 
------解决方案--------------------
mysql> create view v_test as select * from test1 union select * from test1; 
Query OK, 0 rows affected (0.05 sec)
------解决方案--------------------
CREATE VIEW v_test AS SELECT * FROM aa UNION SELECT * FROM aa;
在5.5.32中没有问题