day34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 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 tbl 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%'