Oracle建表

oracle建表
参考网址：http://www.oraclejsq.com/getoracle_jcjc.do?nodeid=010100139

-- create table
create table student.stuinfo
(
  stuid      varchar2(10) not null,--学号：'s'+班号（6位数）+学生序号（3位数）(1)
  stuname    varchar2(50) not null,--学生姓名
  sex        char(1) not null,--性别
  age        number(2) not null,--年龄
  classno    varchar2(6) not null,--班号：年级（4位数）+班级序号（2位数）
  stuaddress varchar2(100) default '地址未录入',--地址 (2)
  grade      char(4) not null,--年级
  enroldate  date,--入学时间
  idnumber   varchar2(18) default '身份证未采集' not null--身份证
)
tablespace users --(3)
  storage
  (
    initial 64k
    minextents 1
    maxextents unlimited
  );
-- add comments to the table 
comment on table student.stuinfo --(4)
  is '学生信息表';
-- add comments to the columns 
comment on column student.stuinfo.stuid -- (5)
  is '学号';
comment on column student.stuinfo.stuname
  is '学生姓名';
comment on column student.stuinfo.sex
  is '学生性别';
comment on column student.stuinfo.age
  is '学生年龄';
comment on column student.stuinfo.classno
  is '学生班级号';
comment on column student.stuinfo.stuaddress
  is '学生住址';
comment on column student.stuinfo.grade
  is '年级';
comment on column student.stuinfo.enroldate
  is '入学时间';
comment on column student.stuinfo.idnumber
  is '身份证号';

 

-- create/recreate primary, unique and foreign key constraints 
alter table student.stuinfo
  add constraint pk_stuinfo_stuid primary key (stuid);
  --把stuid单做主键，主键字段的数据必须是唯一性的（学号是唯一的）
  
-- create/recreate check constraints 
alter table student.stuinfo
  add constraint ch_stuinfo_age
  check (age>0 and age<=50);--给字段年龄age添加约束，学生的年龄只能0-50岁之内的
  
alter table student.stuinfo
  add constraint ch_stuinfo_sex
  check (sex='1' or sex='2');
  
alter table student.stuinfo
  add constraint ch_stuinfo_grade
  check (grade>='1900' and grade<='2999');