![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
设有关系模式:student (sno,sname,age,dept),现利用命令: CREATE VIEW stu AS SELECT*FROM student WHERE dept='cs'WITH CHECK OPTION 创建了一个视图。则以下SQL命令中能正确执行的是( )。
A.
UPDATE stu SET dept='maths'
B.
UPDATE stu SET dept='maths' WHERE age>=20
C.
INSERT INTO stu VALUES('2004001','John',30,'cs')
D.
INSERT INTO stu VALUES('2004001','John',50,'maths')