Combinations of numbers

Question

Hello there,
I would like to know how I could generate a list of combinations of 6 numbers out of numbers between 1- 40.
Can anyone please help me out.
Many thanks,
gunajee.

Answer 1

gunajee wrote:
Like this one but there should not be any repetition of any number in any combination.
WITH x AS (SELECT ROWNUM n FROM dual CONNECT BY ROWNUM<=40)
SELECT  x1.n n1,
        x2.n n2,
        x3.n n3,
        x4.n n4,
        x5.n n5,
        x6.n n6
  FROM  x x1,
        x x2,
        x x3,
        x x4,
        x x5,
        x x6
  WHERE x1.n NOT IN (x2.n,x3.n,x4.n,x5.n,x6.n)
    AND x2.n NOT IN (x3.n,x4.n,x5.n,x6.n)
    AND x3.n NOT IN (x4.n,x5.n,x6.n)
    AND x4.n NOT IN (x5.n,x6.n)
    AND x5.n != x6.n
/SY.