SQL Server 2005中的递归

Question

i Want to genrate possible combination with particluar no in sql server 2005 recursively.

eg

we Have Main No 2 and Sub no 4,5,6 Combination are

2 4
2 5
2 6
4 5
4 6
5 6
5 2 
...........like combination.

Thank u

Answer 1

;With
  List AS (SELECT 2 AS y UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6)
SELECT 
   *
FROM
   List CROSS JOIN list

You'd generate list from your tables

Answer 2

declare @T table (Num int)
insert into @T values (2)
insert into @T values (4)
insert into @T values (5)
insert into @T values (6)

select
  T1.Num as Num1,
  T2.Num as Num2
from @T as T1
  cross join @T as T2

Answer 3

Insert the numbers in TempTable and use Cross Join

Create Table #LeftTemp
(   ID int,
)

Create Table #RightTemp
(   ID int,
)

-- Write insert statements

Select * from #LeftTemp CROSS JOIN #RightTemp