作业34

作业：

1. 查看岗位是teacher的员工姓名、年龄
   select name,age from t1 where job=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 t1 where job=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 tl where job=teacher and salary between 9000 and 10000;
4. 查看岗位描述不为NULL的员工信息
   select * from tl where job 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 tl where job=teacher and salary in (10000, 9000, 300000);
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 tl where job=teacher and 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, age from tl where job=teacher and name like 'jin%';