Oracle 建表

 -- Create table
 create table STUDENT
 (
   sno       VARCHAR2(3) not null,
   sname     VARCHAR2(8) not null,
   ssex      VARCHAR2(3) not null,
   sbirthday DATE,
   class     VARCHAR2(5)
 )
 tablespace TEST.DBF
   pctfree 10
   initrans 1
   maxtrans 255
   storage
   (
     initial 64K
     next 1M
     minextents 1
     maxextents unlimited
   );
 -- Add comments to the table
 comment on table STUDENT
   is '学生表';
 -- Add comments to the columns
 comment on column STUDENT.sno
   is '学号（主键）';
 comment on column STUDENT.sname
   is '学生姓名';
 comment on column STUDENT.ssex
   is '学生性别';
 comment on column STUDENT.sbirthday
   is '学生出生年月';
 comment on column STUDENT.class
   is '学生所在班级';

添加数据：

课程表：

 -- Create table
 create table COURSE
 (
   cno   VARCHAR2(5) not null,
   cname VARCHAR2(20) not null,
   tno   VARCHAR2(3) not null
 )
 tablespace TEST.DBF
   pctfree 10
   initrans 1
   maxtrans 255
   storage
   (
     initial 64K
     next 1M
     minextents 1
     maxextents unlimited
   );
 -- Add comments to the table
 comment on table COURSE
   is '课程表';
 -- Add comments to the columns
 comment on column COURSE.cno
   is '课程号（主键）';
 comment on column COURSE.cname
   is '课程名称';
 comment on column COURSE.tno
   is '教工编号（外键）';

添加数据：

成绩表：

 -- Create table
 create table SCORE
 (
   sno    VARCHAR2(3) not null,
   cno    VARCHAR2(5) not null,
   degree NUMBER(4,1) not null
 )
 tablespace TEST.DBF
   pctfree 10
   initrans 1
   maxtrans 255
   storage
   (
     initial 64K
     next 1M
     minextents 1
     maxextents unlimited
   );
 -- Add comments to the table
 comment on table SCORE
   is '成绩表';
 -- Add comments to the columns
 comment on column SCORE.sno
   is '学号（外键）';
 comment on column SCORE.cno
   is '课程号（外键）';
 comment on column SCORE.degree
   is '成绩';

添加数据：

教师表：

 -- Create table
 create table TEACHER
 (
   tno       VARCHAR2(3) not null,
   tname     VARCHAR2(10) not null,
   tsex      VARCHAR2(3) not null,
   tbirthday DATE,
   prof      VARCHAR2(9),
   depart    VARCHAR2(20) not null
 )
 tablespace TEST.DBF
   pctfree 10
   initrans 1
   maxtrans 255
   storage
   (
     initial 64K
     next 1M
     minextents 1
     maxextents unlimited
   );
 -- Add comments to the table
 comment on table TEACHER
   is '教师表';
 -- Add comments to the columns
 comment on column TEACHER.tno
   is '教工编号（主键）';
 comment on column TEACHER.tname
   is '教工姓名';
 comment on column TEACHER.tsex
   is '教工性别';
 comment on column TEACHER.tbirthday
   is '教工出生年月';
 comment on column TEACHER.prof
   is '职称';
 comment on column TEACHER.depart
   is '教工所在部门';

添加数据：