已知关系模式Student (S# char(8) Primary key, Sname char(10), Ssex char(2),Sage integer, D# char(2), Sclass char(6)),在此基础上定义了视图create view CStud(S#, Sname, Sclass) as (select S#, Sname, Sclass from Student
A、Insert into CStud Values (“98030104”, “张三丰”, “980301” );
B、Insert into CStud Values (98030104, “张三丰”, “980301”);
C、insert into CStud values (“98030104”, 张三丰, Null, Null, “03” , “980301”);
D、insert into CStud values (Null, “张三丰”, “980301”);