Table creation from type - Primary key with 2 columns

Question

Hello,
I have to create a table from a type that I created.
The thing is that I want to create a primary key using two column.
Because this table is junction table.
How can I do this ?
CREATE TABLE CONTENT OF CONTENT_T (ID_COMP primary key, ID_CHAR_J NOT NULL PRIMAR
Y KEY);
Oracle return:
CREATE TABLE CONTENT OF CONTENT_T (ID_COMP primary key,ID_CHAR_J NOT NULL PRIMARY KEY)
ERROR at line 1:
ORA-02260: table can have only one primary key
So I tried:
CREATE TABLE CONTENT OF CONTENT_T (ID_COMP,ID_CHAR_J NOT NULL PRIMARY KEY)
ERROR at line 1:
ORA-02338: missing or invalid column constraint specification
Tahnk's in advance.
Edited by: user8266437 on 29 avr. 2009 13:56
Edited by: user8266437 on 29 avr. 2009 13:56

Answer 1

SCOTT@orcl_11g> CREATE OR REPLACE TYPE content_t AS OBJECT
  2    (id_comp    NUMBER,
  3       id_char_j  VARCHAR2 (10),
  4       other_cols VARCHAR2 (10));
  5  /
Type created.
SCOTT@orcl_11g> CREATE TABLE CONTENT OF CONTENT_T (PRIMARY KEY (ID_COMP, ID_CHAR_J))
  2  /
Table created.
SCOTT@orcl_11g> INSERT INTO content VALUES (content_t (1, 'A', 'WHATEVER'))
  2  /
1 row created.
SCOTT@orcl_11g> COMMIT
  2  /
Commit complete.
SCOTT@orcl_11g> INSERT INTO content VALUES (content_t (1, 'A', 'DUPLICATE'))
  2  /
INSERT INTO content VALUES (content_t (1, 'A', 'DUPLICATE'))
ERROR at line 1:
ORA-00001: unique constraint (SCOTT.SYS_C0062057) violated
SCOTT@orcl_11g> COMMIT
  2  /
Commit complete.
SCOTT@orcl_11g> SELECT * FROM content
  2  /
   ID_COMP ID_CHAR_J  OTHER_COLS
         1 A          WHATEVER
SCOTT@orcl_11g>