Home > Database > Mysql Tutorial > body text

Oracle做学生信息系统的脚本

WBOY
Release: 2016-06-07 14:56:31
Original
1506 people have browsed it

Oracle做学生信息系统的脚本 无 要求的约束条件有: 主键是学号;入学日期必须大于出生日期;总分必须在0到700之间;学号和姓名不能为空create table student (sid number not null primary key,name nvarchar2(10) not null,birthday date,sdate date,addres

Oracle做学生信息系统的脚本
    要求的约束条件有:
  主键是学号;入学日期必须大于出生日期;总分必须在0到700之间;学号和姓名不能为空


create table student (
	sid number not null primary key,
	name nvarchar2(10) not null,
	birthday date,
	sdate date,
	address nvarchar2(20),
	mark number,
	constraint ck_sdate check(sdate>birthday),
	constraint ck_mark check(mark>=0 and mark<=700))tablespace users;

 insert into student values(1001,'张三','1-1月-1981','1-1月-1999','上海',600);


  用OEM再创建以上表student2,添加约束,并在数据输入窗口输入以下记录:

  表字段名(英文部分)及部分数据如下:
  sid(学号)name(姓名)birthday(出生日期)sdate(入学日期)address(家庭地址 ) mark(入学总分)
  1001     张三名         1981-1-1           1999-1-1       张三名的家庭地址       600
  1002     李三名         1982-2-2           2000-1-1       李三名的家庭地址       620
  1003     张四名         1983-3-3           2001-1-1       张四名的家庭地址       580
  1004     李四名         1984-4-4           2002-1-1       李四名的家庭地址       592
Copy after login
  计算出学生总数;
	select count(1) as 学生总数 from student;

  查询出姓名中第二个字符为“三”而且不姓张的学生;
	select * from student where name like '_三%' and name not like '张%';


  查询出在1982-1-1和1984-1-1之间出生的学生的姓名;
	select name,birthday from student where birthday between to_date('1982-1-1','yyyy-MM-dd') and to_date('1984-1-1','yyyy-MM-dd');


  查询出年龄最小的学生;
	select * from student where birthday in (select max(birthday) from student);

  查询出在学校待的时间最长的学生;
	select * from student where sdate in (select min(sdate) from student);

  计算出所有学生总分的平均分;
	select avg(mark) as 平均分 from student;

  显示总分最高的学生的总分和姓名;
	select name,mark from student where mark in (select max(mark) from student);

  删除总分在600以下的学生,然后进行回滚;
	delete from student where mark<600 ;rollback;

  为表添加两列,一列是sex(性别),一列是speciality(专业),
  	其中,专业部分的默认值是“外语”;且有一个名为CK_SEX的约束条件:性别只能是“男”或“女;
  修改专业的默认值为“计算机”;
	alter table student add(sex nvarchar2(4) check (sex='男' or sex='女'), speciality nvarchar2(10) default '外语');
	alter table student modify(speciality default '计算机');
Copy after login
id(编号)  sid(学生编号)  testtype(考试类型) score(分数)
   1	    	1001	       期中             580
   2	   	1001	       期末		590
   3	    	1002           期中             570
   4        	1002           期末	        595
   5       	1003           期中	        570
   6        	1003           期末	        565
	
create table score
(
	id number not null,
	sid number not null,
	testtype nvarchar2(10),
	score number	
);
Copy after login
用OEM界面给score创建一个外键,对应student的主键,然后在sql*plus中用sql语句删除此外键,再用sql语句为score创建一个外键;
	alter table score drop constraint SCORE_FK21245050242859;
	alter table score add (constraint fk_sid foreign key(sid) references student(sid));
Copy after login
	select sid,name,address from student  where mark>610 and sid in
		(select sid from score where testtype='期末' and score>=590);
Copy after login
update score set score=score+10 where testtype='期末' and sid in (select sid from student where mark>=600);
Copy after login
select * from student where sid not in (select sid from score);
Copy after login
Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!