oracle习题及答案

更新时间:2024-05-04 16:38:01 阅读量: 综合文库 文档下载

说明:文章内容仅供预览,部分内容可能不全。下载后的文档,内容与下面显示的完全一致。下载之前请确认下面内容是否您想要的,是否完整无缺。

1. 查询工资大于12000的员工姓名和工资

Select last_name||' '||first_name,salary from employees where salary >12000;

2. 查询员工号为176的员工的姓名和部门号

Select last_name||' '||first_name,department_id from employees where employee_id=176;

3. 选择工资不在5000到12000的员工的姓名和工资

Select last_name||' '||first_name,salary from employees where salary not between 5000 and 12000;

4. 选择雇用时间在1998-02-01到1998-05-01之间的员工姓名,job_id和雇用时间

Select last_name||' '||first_name,job_id,hire_date from employees where hire_date between '1-2月-98' and '1-5月-98';

5. 选择在20或50号部门工作的员工姓名和部门号

Select last_name||' '||first_name,department_id from employees where department_id in (20,50);

6. 选择在1994年雇用的员工的姓名和雇用时间

Select last_name||' '||first_name,hire_date from employees where hire_date like '?';

7. 选择公司中没有管理者的员工姓名及job_id

Select last_name||' '||first_name,job_id from employees where Manger_id is null;

8. 选择公司中有奖金的员工姓名,工资和奖金

Select last_name||' '||first_name,salary,commission_pct from employees where commission_pct is not null;

9. 选择员工姓名的第三个字母是a的员工姓名

Select last_name||' '||first_name from employees where last_name||' '||first_name like '___a%';

10. 选择姓名中有字母a和e的员工姓名 Select

last_name||'

'||first_name

from

employees

where

last_name||first_name like '%a%e%' or last_name||first_name like '%e%a%';

多表查询

11. 显示所有员工的姓名,部门号和部门名称。

Select e.last_name,d.department_id,d.department_name from employees e , departments d where (e.department_id=d.department_id); 12. 查询90号部门员工的job_id和90号部门的location_id

Select e.job_id,d.location_id from employees e, departments d where e.department_id=d.deparement_id and d.department_id=90; 13. 选择所有有奖金的员工的

last_name , department_name , location_id , city

Select e.last_name , d.department_name , l.location_id , city from employees

e,departments

d,locations

l

where

e.department_id=d.department_id AND d.location_id=l.location_id

AND commission_pct is not null;

14. 选择在Toronto工作的员工的

last_name , job_id , department_id , department_name

Select e.last_name , e.job_id , d.department_id , d.department_name from

employees

e,departments

d

,locations

l

where

e.department_id=d.department_id AND d.location_id=l.location_id AND l.city='Toronto';

15. 选择所有员工的姓名,员工号,以及他的管理者的姓名和员工号,结果类似于下面的格式 employees kochhar Emp# 101 manager king Mgr# 100 Select e.employee_id \\\\from employees e,employees d where e.manager_id=d.employee_id(+);

6. 查询各部门员工姓名和他们的同事姓名,结果类似于下面的格式 Department_id 20 Last_name fay colleague hartstein Select e.department_id \d.last_name \e.last_name \from employees e join employees d on(d.department_id=e.department_id) d.last_name<>e.last_name;

where

分组查询

16. 组函数处理多行返回一行(true) 17. 组函数不计算空值( false)

18. where子句在分组之前对检索进行过滤 ( true) 19. 查询公司员工工资的最大值,最小值,平均值,总和

Select max(salary),min(salary),avg(salary),sum(salary) from employees; 20. 查询各job_id的员工工资的最大值,最小值,平均值,总和 Select max(salary),min(salary),avg(salary),sum(salary) from employees group by job_id;

21. 选择具有各个job_id的员工人数

Select job_id,count(*) from employees group by job_id; 22. 查询员工最高工资和最低工资的差距(DIFFERENCE) Select max(salary)-min(salary) \23. 查询各个管理者手下员工的最低工资,其中最低工资不能低于6000,没有管理者的员工不计算在内

Select manager_id,min(salary) from employees where manager_id is not null group by manager_id having min(salary) >=6000;

24. 查询所有部门的名字,location_id,员工数量和工资平均值 Select

d.department_name,d.location_id,count(e.employee_id),avg(e.salary) from

employees

e,departments

group

d

where by

e.department_id(+)=d.department_id

d.location_id,d.department_name;

25. 查询公司的人数,以及在1995-1998年之间,每年雇用的人数,结果类似下面的格式

total 30 1995 3 1996 4 1997 6 1998 7 Select count(employee_id),to_char(hire_date,'yyyy') \from employees where to_char(hire_date,'yyyy') between 1995 and 1998 group by to_char(hire_date,'yyyy') order by y;

Select

子查询

26. 查询和zlotkey相同部门的员工姓名和雇用日期

Select last_name,hire_date,department_id from employees where department_id=(select

department_id

from

employees

where

lower(last_name)='zlotkey') ;

27. 查询工资比公司平均工资高的员工的员工号,姓名和工资。 Select

employee_id,last_name,salary

from

employees

where

salary>(select avg(salary) from employees );

28. 查询和姓名中包含字母u的员工在相同部门的员工的员工号和姓名

Select employee_id,last_name,department_id from employees where department_id =any (select department_id from employees where lower(last_name) like '%u%');

29. 查询在部门的location_id为1700的部门工作的员工的员工号,

department_id和job_id

Select employee_id,department_id,job_id from employees where department_id = any (select department_id from departments where location_id=1700);

30. 查询管理者是king的员工姓名和工资

Select last_name,salary from employees where manager_id=(select employee_id from employees where last_name='King');

创建和管理表 31. 创建表dept name id name Create table dept

( id Number(7),name varchar(25));

Null? type Number(7) Varchar2(25) 32. 将表departments中的数据插入表dept中 Insert into dept(

SELECT department_id, department_name FROM departments);

33. 创建表emp name Null? type id First_name Last_name Dept_id Number(7) Varchar2(25) Varchar2(25) Number(7) Create table emp (id Number(7),First_name varchar(25),Last_name varchar(25),Dept_id number(7)); 34. 将列Last_name的长度增加到50

Alter table emp modify (last_name varchar2(50)); 35. 查询数据字典视图user_tables检查刚才的操作 Select * from user_tables;

36. 根据表employees创建employees2 Create table employees2 as select * from employees; 37. 删除表emp Drop table emp;

38. 将表employees2重命名为emp Rename employees2 to emp;

39. 在表dept和emp中添加新列test_column,并检查所作的操作 Alter table emp add(test_column varchar(10)); 单行函数 40. 显示系统时间

Select to_char(sysdate 'DD-MON-YYYY')from dual;

41. 查询员工号,姓名,工资,以及工资提高百分之20%后的结果(new salary)

Select employee_id,last_name||' '||first_name,salary,salary*1.2 newsalary from employees;

42. 将员工的姓名按首字母排序,并写出姓名的长度(length) Select

last_name,length(last_name)

from

employees

order

by

substr(last_name,1,1) desc;

43. 查询各员工的姓名,并显示出各员工在公司工作的月份数(worked_month)。 Select

last_name||\

'||first_name,months_between(sysdate,hire_date)

worked_month from employees;

44. 查询员工的姓名和工资,按下面的形式显示

Last_name king employees;

SALARY $$$$$$$$$$24000 Select lower(last_name) \\from

45. 查询员工的姓名,以及在公司工作的月份数(worked_month),并按月份数降序排列 Select

last_name||'

'||first_name,months_between(sysdate,hire_date)

worked_month from employees order by worked_month desc; 46. 做一个查询,产生下面的结果

earns monthly but wants

Dream Salary King earns $24000 monthly but wants $72000 Select 'King'||' earns '||lpad(salary,6,'$')||' monthly but wants '||lpad(salary*3,6,'$') \Dream Salary\47. 做一个查询,产生下面的结果add_month(6)+4 Last_name king Hire_date 17-jun-87 reiew Monday,the twenty-first of December , 1987 Select

lower(last_name)

\,MONTH,YYYY') \9做一个查询,产生下面的结果

Employees_and_their_salarys King*************************** 其中每一个*代表一千元。 Select

rpad(last_name,salary/1000+length(last_name),'$')

from

employees where last_name like 'King'; 48. 使用decode函数,按照下面的条件: job grade AD_PRES A ST_MAN B

IT_PROG C SA_REP D ST_CLERK E 产生下面的结果

Last_name king Select last_name,job_id,

Job_id AD_PRES Grade A Decode (job_id ,'AD_PRES',' A ', 'ST_MAN',' B ', 'IT_PROG',' C ', 'SA_REP',' D ' ,

'ST_CLERK',' E ',') Grade from employees; 49. 将第9题的查询用case函数再写一遍。 Select last_name,job_id,

Case job_id when 'AD_PRES' then ' A ' When 'ST_MAN' then ' B ' When 'IT_PROG' then' C ' When 'SA_REP' then ' D ' When 'ST_CLERK' then ' E ' end \ from employees;

本文来源:https://www.bwwdw.com/article/dydg.html

微信扫码分享

《oracle习题及答案.doc》
将本文的Word文档下载到电脑,方便收藏和打印
推荐度:
点击下载文档
下载全文
范文搜索
下载文档
Top