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generate combinations for a number


generate combinations for a number

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RPP
RPP
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if 1,2,3,4 i provide as input, how to generate all the combinations of this number like 1,2,3,4 ; 1,2,4,3 ; 1,3,2,4 ; 1,3,4,2 ; 1,4,2,3 ; 1,4,3,2 ; 2,1,3,4; 2,1,4,3 ; 2,3,1,4... i interchanged last two digits and N-3 increased to 1 for next sequence. this is example of 4 digits, if i enter 10 digits it should provide all the combinations. Could some one help me in providing solution for this. while i am using sql server 2005.

All the numbers will be in series like for 10 digits.. 1,2,3,4,5,6,7,8,9,10. so need to find combinations of these.

thanks in advance,
rpp
Mark Cowne
Mark Cowne
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Can you explain why you want to do this. The number of combinations for 10 digits is huge.

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RPP
RPP
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there could be more than 10 digits also. My main requirement is i need all the combinations to be generated. the series i found like if last (N) and last-1 (N-1) digits are interchanged, in next sequence N-2 can be incremented and generate sequence with missing numbers like in series 1,2,3,4, second sequence wil be 1,2,4,3 ( interchange last two digits). next 1,3,2,4(N-3 digit is incremented and missing numbers 2,4 are placed). it could give all the combinations. but in coding wise how to arrive i couldnt get.

pls provide procedure to generate all the combinations if input is given for @a='1,2,3,4,5,6,7'.. likewise
TJ-356724
TJ-356724
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--drop table @temp
declare @temp table(tag smallint primary key)

insert into @temp(tag)
values(1)


insert into @temp(tag)
values(2)


insert into @temp(tag)
values(3)


insert into @temp(tag)
values(4)


insert into @temp(tag)
values(5)


insert into @temp(tag)
values(6)

insert into @temp(tag)
values(7)

insert into @temp(tag)
values(8)

insert into @temp(tag)
values(9)

insert into @temp(tag)
values(10)


--2 records
--Time 0 sec
If (select count(*) from @temp)=2
begin
select t1.tag as t1 ,t2.tag as t2 from @temp t1
cross join @temp t2
where t1.tag <> t2.tag
--order by t1.tag,t2.tag
end

--3 records
--Time 0 sec
If (select count(*) from @temp)=3
begin
select t1.tag as t1 ,t2.tag as t2, t3.tag as t3 from @temp t1
cross join @temp t2
cross join @temp t3
where t1.tag <> t2.tag
and t1.tag <> t3.tag
and t2.tag <> t3.tag
--order by t1.tag,t2.tag,t3.tag
end


--4 records
--Time 0 sec
If (select count(*) from @temp)=4
begin
select t1.tag as t1 ,t2.tag as t2, t3.tag as t3 ,t4.tag as t4 from @temp t1
cross join @temp t2
cross join @temp t3
cross join @temp t4

where t1.tag <> t2.tag
and t1.tag <> t3.tag
and t1.tag <> t4.tag

and t2.tag <> t3.tag
and t2.tag <> t4.tag

and t3.tag <> t4.tag

--order by t1.tag,t2.tag,t3.tag,t4.tag
end


--5 records
--Time 1 sec
If (select count(*) from @temp)=5
begin
select t1.tag as t1 ,t2.tag as t2, t3.tag as t3 ,t4.tag as t4 ,t5.tag as t5 from @temp t1
cross join @temp t2
cross join @temp t3
cross join @temp t4
cross join @temp t5

where t1.tag <> t2.tag
and t1.tag <> t3.tag
and t1.tag <> t4.tag
and t1.tag <> t5.tag

and t2.tag <> t3.tag
and t2.tag <> t4.tag
and t2.tag <> t5.tag

and t3.tag <> t4.tag
and t3.tag <> t5.tag

and t4.tag <> t5.tag

--order by t1.tag,t2.tag,t3.tag,t4.tag,t5.tag
end



--6 records
--Time 2 sec
If (select count(*) from @temp)=6
begin
select t1.tag as t1 ,t2.tag as t2, t3.tag as t3 ,t4.tag as t4 ,t5.tag as t5,t6.tag as t6 from @temp t1
cross join @temp t2
cross join @temp t3
cross join @temp t4
cross join @temp t5
cross join @temp t6
where t1.tag <> t2.tag
and t1.tag <> t3.tag
and t1.tag <> t4.tag
and t1.tag <> t5.tag
and t1.tag <> t6.tag

and t2.tag <> t3.tag
and t2.tag <> t4.tag
and t2.tag <> t5.tag
and t2.tag <> t6.tag

and t3.tag <> t4.tag
and t3.tag <> t5.tag
and t3.tag <> t6.tag

and t4.tag <> t5.tag
and t4.tag <> t6.tag

and t5.tag <> t6.tag

--order by t1.tag,t2.tag,t3.tag,t4.tag,t5.tag,t6.tag
end



--7 records
--Time 6 sec
If (select count(*) from @temp)=7
begin
select t1.tag as t1 ,t2.tag as t2, t3.tag as t3 ,t4.tag as t4 ,t5.tag as t5,t6.tag as t6 ,t7.tag as t7 from @temp t1
cross join @temp t2
cross join @temp t3
cross join @temp t4
cross join @temp t5
cross join @temp t6
cross join @temp t7
where t1.tag <> t2.tag
and t1.tag <> t3.tag
and t1.tag <> t4.tag
and t1.tag <> t5.tag
and t1.tag <> t6.tag
and t1.tag <> t7.tag


and t2.tag <> t3.tag
and t2.tag <> t4.tag
and t2.tag <> t5.tag
and t2.tag <> t6.tag
and t2.tag <> t7.tag

and t3.tag <> t4.tag
and t3.tag <> t5.tag
and t3.tag <> t6.tag
and t3.tag <> t7.tag

and t4.tag <> t5.tag
and t4.tag <> t6.tag
and t4.tag <> t7.tag

and t5.tag <> t6.tag
and t5.tag <> t7.tag

and t6.tag <> t7.tag

--order by t1.tag,t2.tag,t3.tag,t4.tag,t5.tag,t6.tag,t7.tag
end



--8 records
--Time 17 sec
If (select count(*) from @temp)=8
begin
select t1.tag as t1 ,t2.tag as t2, t3.tag as t3,
t4.tag as t4 ,t5.tag as t5,
t6.tag as t6 ,t7.tag as t7,
t8.tag as t8
from @temp t1
cross join @temp t2
cross join @temp t3
cross join @temp t4
cross join @temp t5
cross join @temp t6
cross join @temp t7
cross join @temp t8
where t1.tag <> t2.tag
and t1.tag <> t3.tag
and t1.tag <> t4.tag
and t1.tag <> t5.tag
and t1.tag <> t6.tag
and t1.tag <> t7.tag
and t1.tag <> t8.tag

and t2.tag <> t3.tag
and t2.tag <> t4.tag
and t2.tag <> t5.tag
and t2.tag <> t6.tag
and t2.tag <> t7.tag
and t2.tag <> t8.tag

and t3.tag <> t4.tag
and t3.tag <> t5.tag
and t3.tag <> t6.tag
and t3.tag <> t7.tag
and t3.tag <> t8.tag

and t4.tag <> t5.tag
and t4.tag <> t6.tag
and t4.tag <> t7.tag
and t4.tag <> t8.tag

and t5.tag <> t6.tag
and t5.tag <> t7.tag
and t5.tag <> t8.tag

and t6.tag <> t7.tag
and t6.tag <> t8.tag

and t7.tag <> t8.tag

--order by t1.tag,t2.tag,t3.tag,t4.tag,t5.tag,t6.tag,t7.tag,t8.tag
end




--9 records
--Time 22 sec
If (select count(*) from @temp)=9
begin
select t1.tag as t1 ,t2.tag as t2,t3.tag as t3,
t4.tag as t4,t5.tag as t5,
t6.tag as t6,t7.tag as t7,
t8.tag as t8,t9.tag as t9
from @temp t1
cross join @temp t2
cross join @temp t3
cross join @temp t4
cross join @temp t5
cross join @temp t6
cross join @temp t7
cross join @temp t8
cross join @temp t9
where t1.tag <> t2.tag
and t1.tag <> t3.tag
and t1.tag <> t4.tag
and t1.tag <> t5.tag
and t1.tag <> t6.tag
and t1.tag <> t7.tag
and t1.tag <> t8.tag
and t1.tag <> t9.tag

and t2.tag <> t3.tag
and t2.tag <> t4.tag
and t2.tag <> t5.tag
and t2.tag <> t6.tag
and t2.tag <> t7.tag
and t2.tag <> t8.tag
and t2.tag <> t9.tag

and t3.tag <> t4.tag
and t3.tag <> t5.tag
and t3.tag <> t6.tag
and t3.tag <> t7.tag
and t3.tag <> t8.tag
and t3.tag <> t9.tag

and t4.tag <> t5.tag
and t4.tag <> t6.tag
and t4.tag <> t7.tag
and t4.tag <> t8.tag
and t4.tag <> t9.tag

and t5.tag <> t6.tag
and t5.tag <> t7.tag
and t5.tag <> t8.tag
and t5.tag <> t9.tag

and t6.tag <> t7.tag
and t6.tag <> t8.tag
and t6.tag <> t9.tag

and t7.tag <> t8.tag
and t7.tag <> t9.tag

and t8.tag <> t9.tag


--order by t1.tag,t2.tag,t3.tag,t4.tag,t5.tag,t6.tag,t7.tag,t8.tag,t9.tag
end


--10 records
--Time 1 min 45 sec
If (select count(*) from @temp)=10
begin
select t1.tag as t1 ,t2.tag as t2,t3.tag as t3,
t4.tag as t4,t5.tag as t5,
t6.tag as t6,t7.tag as t7,
t8.tag as t8,t9.tag as t9,
t10.tag as t10
from @temp t1
cross join @temp t2
cross join @temp t3
cross join @temp t4
cross join @temp t5
cross join @temp t6
cross join @temp t7
cross join @temp t8
cross join @temp t9
cross join @temp t10

where t1.tag <> t2.tag
and t1.tag <> t3.tag
and t1.tag <> t4.tag
and t1.tag <> t5.tag
and t1.tag <> t6.tag
and t1.tag <> t7.tag
and t1.tag <> t8.tag
and t1.tag <> t9.tag
and t1.tag <> t10.tag

and t2.tag <> t3.tag
and t2.tag <> t4.tag
and t2.tag <> t5.tag
and t2.tag <> t6.tag
and t2.tag <> t7.tag
and t2.tag <> t8.tag
and t2.tag <> t9.tag
and t2.tag <> t10.tag


and t3.tag <> t4.tag
and t3.tag <> t5.tag
and t3.tag <> t6.tag
and t3.tag <> t7.tag
and t3.tag <> t8.tag
and t3.tag <> t9.tag
and t3.tag <> t10.tag

and t4.tag <> t5.tag
and t4.tag <> t6.tag
and t4.tag <> t7.tag
and t4.tag <> t8.tag
and t4.tag <> t9.tag
and t4.tag <> t10.tag

and t5.tag <> t6.tag
and t5.tag <> t7.tag
and t5.tag <> t8.tag
and t5.tag <> t9.tag
and t5.tag <> t10.tag

and t6.tag <> t7.tag
and t6.tag <> t8.tag
and t6.tag <> t9.tag
and t6.tag <> t10.tag

and t7.tag <> t8.tag
and t7.tag <> t9.tag
and t7.tag <> t10.tag

and t8.tag <> t9.tag
and t8.tag <> t10.tag

and t9.tag <> t10.tag


--order by t1.tag,t2.tag,t3.tag,t4.tag,t5.tag,t6.tag,t7.tag,t8.tag,t9.tag,t10.tag
end





--select tag as t1,t2,t3,t4,t5,t6,t7 from @temp1
--group by tag,t2,t3,t4,t5,t6,t7
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