ORACLE建表练习

1,学生表

 -- Create table
 create table T_HQ_XS
 (
   xueh   VARCHAR2(10) not null,
   xingm  VARCHAR2(20) not null,
   xingb  CHAR(1) default '',
   nianl  NUMBER,
   zhuany VARCHAR2(20)
 )
 
 -- Add comments to the columns
 comment on column T_HQ_XS.xueh
   is '学号';
 comment on column T_HQ_XS.xingm
   is '姓名';
 comment on column T_HQ_XS.xingb
   is '性别 1-男,2-女';
 comment on column T_HQ_XS.nianl
   is '年龄';
 comment on column T_HQ_XS.zhuany
   is '专业';
 -- Create/Recreate primary, unique and foreign key constraints
 alter table T_HQ_XS
   add constraint PK_T_HQ_XS primary key (XUEH)
 
 -- Create/Recreate check constraints
 alter table T_HQ_XS
   add constraint CHECK_T_HQ_XS_NIANL
   check (NIANL > 8 AND NIANL < 50);
 alter table T_HQ_XS
   add constraint CHECK_T_HQ_XS_XINGB
   check (XINGB = '' OR XINGB = '');

2,成绩表

 -- Create table
 create table T_HQ_CJ
 (
   xueh    VARCHAR2(10) not null,
   java    NUMBER(4,1),
   oracle  NUMBER(4,1),
   android NUMBER(4,1)
 )
 
 -- Add comments to the columns
 comment on column T_HQ_CJ.xueh
   is '学号';
 comment on column T_HQ_CJ.java
   is 'java课成绩';
 comment on column T_HQ_CJ.oracle
   is 'Oracle课成绩';
 comment on column T_HQ_CJ.android
   is '安卓课成绩';
 -- Create/Recreate primary, unique and foreign key constraints
 alter table T_HQ_CJ
   add constraint PK_T_HQ_CJ primary key (XUEH)
 -- Create/Recreate check constraints
 alter table T_HQ_CJ
   add constraint CHECK_T_HQ_CJ_ANDROID
   check (ANDROID >= 0 AND ANDROID <=100);
 alter table T_HQ_CJ
   add constraint CHECK_T_HQ_CJ_JAVA
   check (JAVA >= 0 AND JAVA <=100);
 alter table T_HQ_CJ
   add constraint CHECK_T_HQ_CJ_ORACLE
   check (ORACLE >= 0 AND ORACLE <=100);

3,课本领用表

-- Create table
create table T_HQ_KB
(
  xueh     varchar2(10) not null,
  java     char(1) default '',
  javarq   date,
  oracle   char(1) default '',
  oraclerq date
)
;
-- Add comments to the columns
comment on column T_HQ_KB.xueh
  is '学号';
comment on column T_HQ_KB.java
  is 'java课本是否已领用0-否,1-是';
comment on column T_HQ_KB.javarq
  is 'java课本领用日期';
comment on column T_HQ_KB.oracle
  is 'oracle课本是否已领用0-否,1-是';
comment on column T_HQ_KB.oraclerq
  is 'oracle课本领用日期';
-- Create/Recreate primary, unique and foreign key constraints
alter table T_HQ_KB
  add constraint PK_T_HQ_KB primary key (XUEH);
-- Create/Recreate check constraints
alter table T_HQ_KB
  add constraint CHECK_T_HQ_KB_JAVA
  check (JAVA = '' OR JAVA = '');
alter table T_HQ_KB
  add constraint CHECK_T_HQ_KB_ORACLE
  check (ORACLE = '' OR ORACLE = '');