SQL> desc customer
 Name					   Null?    Type
 ----------------------------------------- -------- ----------------------------
 ID						    NUMBER
 NAME						    VARCHAR2(40)

SQL> desc orders
 Name					   Null?    Type
 ----------------------------------------- -------- ----------------------------
 ID						    NUMBER
 ORDERID					    NUMBER

SQL> desc orderrad
 Name					   Null?    Type
 ----------------------------------------- -------- ----------------------------
 ORDERID					    NUMBER
 ARTICLEID					    NUMBER

SQL> desc articles
 Name					   Null?    Type
 ----------------------------------------- -------- ----------------------------
 ARTICLEID					    NUMBER
 PRICE						    NUMBER

SQL> select * from customer
  2  ;

	ID NAME
---------- ----------------------------------------
	 1 bob
	 2 mary
	 3 frank

SQL> select * from orders;

	ID    ORDERID
---------- ----------
	 1	    1
	 1	    2
	 2	    3
	 2	    4
	 3	    5
	 3	    6
	 3	    7

7 rows selected.

SQL> select * from orderrad;

   ORDERID  ARTICLEID
---------- ----------
	 1	    1
	 1	    1
	 1	    1
	 2	    2
	 2	    3
	 3	    4
	 3	    1
	 3	    3
	 4	    1
	 4	    2
	 4	    2

   ORDERID  ARTICLEID
---------- ----------
	 4	    2
	 4	    2
	 4	    2
	 4	    2
	 5	    1
	 5	    3
	 5	    3
	 5	    3
	 6	    2
	 6	    2
	 6	    2

   ORDERID  ARTICLEID
---------- ----------
	 6	    2
	 6	    2
	 6	    2
	 6	    2
	 6	    2
	 6	    2
	 6	    2
	 7	    3
	 7	    3
	 7	    3
	 7	    3

   ORDERID  ARTICLEID
---------- ----------
	 7	    3
	 7	    3
	 7	    3
	 8	    1
	 8	    1
	 8	    1
	 8	    1
	 8	    1
	 8	    1
	 8	    1
	 8	    1

   ORDERID  ARTICLEID
---------- ----------
	 8	    1
	 8	    1
	 8	    1

47 rows selected.

SQL> select * from articles;

 ARTICLEID	PRICE
---------- ----------
	 1	99.99
	 2	    1
	 3	55.55
	 4	99.44