作业 查看岗位是teacher的员工姓名.年龄 select name,age from teacher where post='teacher'; 查看岗位是teacher且年龄大于30岁的员工姓名.年龄 select name,age from teacher where post='teacher' and age >30; 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 teacher where s…