ORACLE建表练习

 1 -- Create table
 2 create table T_HQ_XS
 3 (
 4   xueh   VARCHAR2(10) not null,
 5   xingm  VARCHAR2(20) not null,
 6   xingb  CHAR(1) default ‘1‘,
 7   nianl  NUMBER,
 8   zhuany VARCHAR2(20)
 9 )
10 
11 -- Add comments to the columns 
12 comment on column T_HQ_XS.xueh
13   is ‘学号‘;
14 comment on column T_HQ_XS.xingm
15   is ‘姓名‘;
16 comment on column T_HQ_XS.xingb
17   is ‘性别 1-男,2-女‘;
18 comment on column T_HQ_XS.nianl
19   is ‘年龄‘;
20 comment on column T_HQ_XS.zhuany
21   is ‘专业‘;
22 -- Create/Recreate primary, unique and foreign key constraints 
23 alter table T_HQ_XS
24   add constraint PK_T_HQ_XS primary key (XUEH)
25 
26 -- Create/Recreate check constraints 
27 alter table T_HQ_XS
28   add constraint CHECK_T_HQ_XS_NIANL
29   check (NIANL > 8 AND NIANL < 50);
30 alter table T_HQ_XS
31   add constraint CHECK_T_HQ_XS_XINGB
32   check (XINGB = ‘1‘ OR XINGB = ‘2‘);

 1 -- Create table
 2 create table T_HQ_CJ
 3 (
 4   xueh    VARCHAR2(10) not null,
 5   java    NUMBER(4,1),
 6   oracle  NUMBER(4,1),
 7   android NUMBER(4,1)
 8 )
 9 
10 -- Add comments to the columns 
11 comment on column T_HQ_CJ.xueh
12   is ‘学号‘;
13 comment on column T_HQ_CJ.java
14   is ‘java课成绩‘;
15 comment on column T_HQ_CJ.oracle
16   is ‘Oracle课成绩‘;
17 comment on column T_HQ_CJ.android
18   is ‘安卓课成绩‘;
19 -- Create/Recreate primary, unique and foreign key constraints 
20 alter table T_HQ_CJ
21   add constraint PK_T_HQ_CJ primary key (XUEH)
22 -- Create/Recreate check constraints 
23 alter table T_HQ_CJ
24   add constraint CHECK_T_HQ_CJ_ANDROID
25   check (ANDROID >= 0 AND ANDROID <=100);
26 alter table T_HQ_CJ
27   add constraint CHECK_T_HQ_CJ_JAVA
28   check (JAVA >= 0 AND JAVA <=100);
29 alter table T_HQ_CJ
30   add constraint CHECK_T_HQ_CJ_ORACLE
31   check (ORACLE >= 0 AND ORACLE <=100);

-- Create table
create table T_HQ_KB
(
  xueh     varchar2(10) not null,
  java     char(1) default ‘0‘,
  javarq   date,
  oracle   char(1) default ‘0‘,
  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 = ‘0‘ OR JAVA = ‘1‘);
alter table T_HQ_KB
  add constraint CHECK_T_HQ_KB_ORACLE
  check (ORACLE = ‘0‘ OR ORACLE = ‘1‘);