heap table : Table space « Table « Oracle PL / SQL

1. Oracle PL / SQL
2. Table
3. Table space

heap table

  
SQL>
SQL>
SQL> create table subjects (
  2        subject_id    number not null,
  3        subject_name  varchar2(30) not null,
  4        description   varchar2(4000)
  5  )
  6  tablespace users;

Table created.

SQL>
SQL> alter table subjects add constraint pk_subjects primary key (subject_id);

Table altered.

SQL>
SQL> create table courses (
  2        course_id   number not null,
  3        course_name varchar2(60) not null,
  4        subject_id  number not null,
  5        duration    number(2),
  6        skill_lvl   varchar2(12) not null
  7  )
  8  tablespace users;

Table created.

SQL>
SQL> alter table courses add constraint pk_courses primary key (course_id);

Table altered.

SQL>
SQL> alter table courses add constraint fk_course_subj foreign key (subject_id) references subjects (subject_id);

Table altered.

SQL>
SQL> alter table courses add constraint ck_level check(
  2  skill_lvl in ('BEGINNER', 'INTERMEDIATE', 'ADVANCED')
  3  );

Table altered.

SQL>
SQL> drop table subjects cascade constraints;

Table dropped.

SQL> drop table courses cascade constraints;

Table dropped.

SQL>

   
  

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