oracle pl/sql 中表的创建

oracle中表、主键、索引都有存贮数属性,

  tablespace TTTS
  pctfree 10
  initrans 2
  maxtrans 255
  storage
  (
    initial 64K
    minextents 1
    maxextents unlimited
  );

索引它们都是被实实在在存在磁盘中。而外键、视图等都没有存贮属性，只是被记录在oracle的后台表中而已。

-- Create table
create table CERTTYPE
(
  CERTTYPEID         NUMBER(3) not null,
  CERTTYPENAME       VARCHAR2(30) not null,
  RIGHTTYPEID        NUMBER(3),
  CERTPRENAME        VARCHAR2(20),
  CERTPRENAMESOURCE  VARCHAR2(200),
  CERTPRENAMESUFFIX  VARCHAR2(20),
  CERTPOSTWORDSOURCE VARCHAR2(200),
  CERTPOSTWORDSUFFIX VARCHAR2(20),
  CERTPOSTIDPREFIX   VARCHAR2(20),
  CERTPOSTIDSOURCE   VARCHAR2(200),
  CERTPOSTIDCODERULE NUMBER(1) default 1 not null,
  CERTPOSTIDLENGTH   NUMBER(2) default 6 not null,
  CERTPOSTIDSUFFIX   VARCHAR2(20),
  PARENTCERTTYPEID   NUMBER(3),
  CERTPOSTIDSTARTID  NUMBER(12) default 1 not null,
  READONLY           NUMBER(1) default 0 not null
);
-- Create/Recreate primary, unique and foreign key constraints
alter table CERTTYPE
  add constraint PK_CERTTYPE primary key (CERTTYPEID);
alter table CERTTYPE
  add constraint FK_CERTTYPE_RIGHTTYPE foreign key (RIGHTTYPEID)
  references RIGHTTYPE (RIGHTTYPEID);
alter table CERTTYPE
  add constraint FK_CERTTYPE_SELF foreign key (PARENTCERTTYPEID)
  references CERTTYPE (CERTTYPEID) on delete set null;
-- Create/Recreate indexes
create index IDX_CERTTYPE_PARENTCERTTYPEID on CERTTYPE (PARENTCERTTYPEID);
create index IDX_CERTTYPE_RIGHTTYPEID on CERTTYPE (RIGHTTYPEID);