操作数据库作业day34

1. 查看岗位是teacher的员工姓名、年龄

select name,age from employee where post='teacher'; 

2. 查看岗位是teacher且年龄大于30岁的员工姓名、年龄

select name,age from employee where post='teacher' and age>30; 

3. 查看岗位是teacher且薪资在9000-1000范围内的员工姓名、年龄、薪资

select name,age,salary from employee where post='teacher' and salary between 1000 and 9000; 	

4. 查看岗位描述不为NULL的员工信息

select * from employee where post is not null; 

5. 查看岗位是teacher且薪资是10000或9000或30000的员工姓名、年龄、薪资

select name,age,salary from employee where post='teacher' and salary=10000 or salary=9000 or salary=30000; 

6. 查看岗位是teacher且薪资不是10000或9000或30000的员工姓名、年龄、薪资

select name,age,salary from employee where post='teacher' and salary!=10000 and salary!=9000 and salary!=30000; 

7. 查看岗位是teacher且名字是jin开头的员工姓名、年薪

select name,salary*12 from employee where post='teacher' and name li'jin%';