r1:

A  B  C
-------
0  1  3
2  1  0
1  1  1
2  0  3

CREATE TABLE r1(A INT, B INT, C INT);
INSERT INTO r1 VALUES(0,1,3);
INSERT INTO r1 VALUES(2,1,0);
INSERT INTO r1 VALUES(1,1,1);
INSERT INTO r1 VALUES(2,0,3);






r2:

C  D  E
-------
2  1  1
3  1  2
3  1  0


CREATE TABLE r2 (C INT, D INT, E INT);
INSERT INTO r2 VALUES(2,1,1);
INSERT INTO r2 VALUES(3,1,2);
INSERT INTO r2 VALUES(3,1,0);






r3

E  F
----
1  1
2  4

CREATE TABLE r3(E INT, F INT);
INSERT INTO r3 VALUES(1,1);
INSERT INTO r3 VALUES(2,4);






r4

A  B  C
-------
4  2  1
2  1  0
1  1  1

CREATE TABLE r4 (A INT, B INT, C INT);
INSERT INTO r4 VALUES(4,2,1);
INSERT INTO r4 VALUES(2,1,0);
INSERT INTO r4 VALUES(1,1,1);



r1:          r2:         r3:       r4:

A  B  C      C  D  E     E  F      A  B  C
-------      -------     ----      -------
0  1  3      2  1  1     1  1      4  2  1
2  1  0      3  1  2     2  4      2  1  0
1  1  1      3  1  0               1  1  1
2  0  3