以下是修改视图的语句是
A: create or replace view st1 as select* from student;
B: alter view st1 as select name from student join class on student.cid=class.id;
C: alter table st1 modify class int(3);
D: create or replace table st1 as select* from student;
A: create or replace view st1 as select* from student;
B: alter view st1 as select name from student join class on student.cid=class.id;
C: alter table st1 modify class int(3);
D: create or replace table st1 as select* from student;
举一反三
- 下列哪条语句可以创建视图( )。 A: create view v_student as select * from student; B: alter view v_student as select * from student; C: drop view v_student as select * from student; D: sp_help view v_student as select * from student;
- 在student表上创建view_stu视图,正确的语句是( )。 A: CREATE VIEW view_stu IS SELECT * FROM student; B: CREATE VIEW view_stu AS SELECT * FROM student; C: CREATE VIEW view_stu SELECT * FROM student; D: CREATE VIEW SELECT * FROM student AS view_stu;
- 下面定义视图的SQL语句，哪一个是错误的？（ ） A: create view VIEW1 as select id,name,sex from users B: create view VIEW2 as select count(*) as studentTotal,classname from student C: create view VIEW3 as select name,price from D: create view VIEW4 as select logdate,price,1.1*parice as ‘涨价’ from shop
- 下面关于修改视图的SQL语句，那个是正确的（ ）。 A: alter view VIEW01 as select * from users order by age desc B: alter view VIEW02 as select name,avg(score) as avgScore from studentScore C: alter view VIEW03 as select top 10 id,name,password from admin order by id D: alter view VIEW04 as select * from stuent,class where student.classid=class.classid order by class.classid
- 查询Student表中的所有记录的Sname、Ssex和Class列。 A: select Sname,Ssex,Class from student B: show Sname,Ssex,Class from student C: select * from student D: select Sname,Ssex,Class from course