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');