已知有student表，studentid为主键，现在表中共有10行记录，studentid列值从1到10创建视图:createviewdbo.view_studentasselect*fromdbo.student接着执行如下命令:deletefromview_studentwhere(studentid=8);然后执行查询命令:select*fromstudent;select*fromview_student;假定上述命令全部执行成功，将各自返回()行记录。()