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!