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#1. 创建视图emp_v1,要求查询电话号码以‘011’开头的员工姓名和工资、邮箱
create or replace view emp_v1
as
select last_name, email
from employees
where tell like "011%";#2. 要求将视图emp_v1 修改为查询电话号码以‘011’开头的并且邮箱中包含e字符的员工姓名和邮箱、电话号码
create or replace view emp_v1
as
select last_name, email, tell
from employees
where tell like "011%"
and email like "%e%;#3. 向emp_v1 插入一条记录，是否可以？
INSERT INTO emp_v1(last_name,salary,email,phone_number)
VALUES('Tom',2300,'tom@126.com','1322321312');#4. 修改emp_v1中员工的工资，每人涨薪1000
update emp_v1
set salary = salary +1000;#5. 删除emp_v1中姓名为Olsen的员工
delete from emp_v1
where last_name = 'Olsen';#6. 创建视图emp_v2，要求查询部门的最高工资高于12000 的部门id和其最高工资
create or replace emp_v2
as
select department_id, max(salary)
from departments
group by department_id
having max(salary) > 12000;#7. 向emp_v2 中插入一条记录，是否可以?#8. 删除刚才的emp_v2 和emp_v1
drop view emp_v2, emp_v1;
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