建立信息系统学生的视图是（）
A. CREATE VIEW is_student AS SELECT sno,sname,sage FROM student WHERE sdpt='is';
B. CREATE VIEW is_student SELECT sno,sname,sageFROM WHERE sdpt='is';
CREATE VIEW is_student AS select sno,sname,sage FROM WHERE sdpt='is'
D. CREATE VIEW is_student AS SELECT sno,sname,sage WHERE sdpt='is';
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