第11章 SQL练习答案.docx

1、第11章 SQL练习答案1实训题根据人力资源管理系统数据库中数据信息，完成下列操作。（1）查询100号部门的所有员工信息。Selsect * from employees where department_id = 100（2）查询所有职位编号为“SA_MAN”的员工的员工号、员工名和部门号。Select employee_id,first_name,last_name,department_id from employees where job_id= SA_MAN（3）查询每个员工的员工号、工资、奖金以及工资与奖金的和。Select employee_id,salary,commissio

2、n_pct,salary*(1+nvl(commission_pct,0) from employees（4）查询40号部门中职位编号为“AD_ASST”和20号部门中职位编号为“SA_REP”的员工的信息。 Select * from employees where department_id=40 and job_id= AD_ASST OR department_id=20 and job_id= SA_REP;（5）查询所有职位名称不是“Stock Manager”和“Purchasing Manager”，且工资大于或等于2000的员工的详细信息。Select * from empl

3、oyees where job_id not in( Stock Manager, Purchasing Manager) and salary=2000（6）查询有奖金的员工的不同职位编号和名称。 Select distinct job_id, job_title from jobs where job_id in (select job_id from employees where job_id is not null)（7）查询没有奖金或奖金低于100元的员工信息。Select * from employees where salary*commission_pct100 or com

4、mission is NULL（8）查询员工名（first_name）中不包含字母“S”的员工。Select first_name from employees where first_name not like %S%（9）查询员工的姓名和入职日期，并按入职日期从先到后进行排序。Select first_name,last_name,hire_date from employees order by hire_date;（10）显示所有员工的姓名、职位、工资和奖金，按职位降序排序，若职位相同则按工资升序排序。Select first_name,last_name,job_id,salary

5、,salary*commission_pet from employees order by job_id desc ,salary asc;（11）查询所有员工的姓名及其直接上级的姓名。Select a.first_name,b.first_name from employees a join employees b on b.employee_id = a.manage_id （12）查询入职日期早于其直接上级领导的所有员工信息。 select * from employees a where hire_date(select salary from employees where emp

6、loyee_id = 100);（19）查询工资高于公司平均工资的所有员工信息。Select * from employees where salary(select avg(salary) from employees)（20）查询各个部门中不同职位的最高工资。Select job_id,max(salary) from employees group by job_id（21）查询各个部门的人数及平均工资 Select department_id,count(*),avg(salary ) from employees group by department_id; （22）统计各个职位的

7、员工人数与平均工资。Select job_id ,count(employee_id),avg(salary) from employees group by job_id;（23）统计每个部门中各职位的人数与平均工资。Select department_id,job_id,count(*),avg(salary) from employees group by department_id,job_id;（24）查询最低工资大于5000元的各种工作。Select job_id,job_title from jobs where job_id in(Select job_id from empl

8、oyees group by job_id having min(salary)5000);（25）查询平均工资低于6000元的部门及其员工信息。 Select e.*,d.* from employees e join departments d on e.department_id=d.department_id and department_id in(select department_Id from employees group by employee_id having avg(salary)(select max(salary) from employees deparment

9、_id=30);（29）查询每个部门中的员工数量、平均工资和平均工作年限。Select count(*),avg(salary),avg(round(sysdate-hire_date)/365) from employees group by department_id（30）查询工资为某个部门平均工资的员工的信息。Select * from employees where salsry in(select avg(Salary) from employees group by department_id)（31）查询工资高于本部门平均工资的员工的信息。Select * from emplo

10、yees e1 where salary(select avg(salary) from employees e2 where e2.department_id=e1.department_id )（32）查询工资高于本部门平均工资的员工的信息及其部门的平均工资。Select e.*,avgsalFrom employees e join (select department_id,avg(salary) avgsal from employees group by department_id) dOn e.department_id=d.department_id And e.salaryd

11、.avgsal（33）查询工资高于50号部门某个员工工资的员工的信息。Select *from employees where salaryany(select salary from employees where department_id=50):（34）查询工资、奖金与10号部门某员工工资、奖金都相同的员工的信息。Select * from employees where (salary,nvl(commission_pct) ) in(Select salary,nvl(commission_pct) from employees where department_id=10)（35

12、）查询部门人数大于10的部门的员工信息。Select * from employees where department_id in(select department_id from employees group by department_id having count(*)10);查询所有员工工资都大于10000元的部门的信息Select * from department where department_id in (select department_id from employees group by department_id having min(salary)10000)

13、（36）查询所有员工工资都大于5000元的部门的信息及其员工信息。（37）查询所有员工工资都在4000元8000元之间的部门的信息。Select * from departments where department_id in(Select department_id from employees group by department_id having min(salary)=4000 and max(salary)=all(select count(*) from employees group by department_id )（39）查询30号部门中工资排序前3名的员工信息。Se

14、lect * from employee where department_id=30 and salary is not null and rownum=3 order by salary desc （40）查询所有员工中工资排序在510名之间的员工信息。Select * from (Select rownum rn,employee_id,salary from (Select employee_id,salary from employees where salary is not null order by salary desc) e1 )e2Where rn between 5 a

15、nd 10（41）向employees表中插入一条记录，员工号为1000元，入职日期为2002年5月10日，email为*.cn，其他信息与员工号为150的员工相同。（42）将各部门员工的工资修改为该员工所在部门平均工资加1000。（43）查询各月倒数第2天入职的员工信息。（44）查询工龄大于或等于10年的员工信息。（45）查询员工信息，要求以首字母大写的方式显示所有员工姓（last_name）和员工名（first_name）。（46）查询员工名（first_name）正好为6个字符的员工的信息。（47）查询员工名（first_name）的第2个字母为“M”的员工信息。（48）查询所有员工名（first_name），如果包含字母“s”，则用“S”替换。（49）查询在2月份入职的所有员工信息。（资料素材和资料部分来自网络，供参考。可复制、编制，期待你的好评与关注）