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HomeDatabaseMysql TutorialOracle做学生信息系统的脚本

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
  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');
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	
);
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));
	select sid,name,address from student  where mark>610 and sid in
		(select sid from score where testtype='期末' and score>=590);
update score set score=score+10 where testtype='期末' and sid in (select sid from student where mark>=600);
select * from student where sid not in (select sid from score);
Statement
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