课后作业 day34

作业：

1. 查看岗位是teacher的员工姓名、年龄  
	select name,age from staff_t where station = '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 staff_t where station = '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 staff_t where station = 'teacher' 
    	and salary between 9000 and 10000;

4. 查看岗位描述不为NULL的员工信息   
	select * from staff_t where staff_msg 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 staff_t where salary in (10000,9000,30000);

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 staff_t where salary not in (10000,9000,30000);

7. 查看岗位是teacher且名字是jin开头的员工姓名、年薪
	select name,salary from staff_t where station = 'teacher' and name like 'jin%';