T-SQL PIVOT on one column to append the others - sql

Question

Given this table (there's always 2 duplicates of Combinations):
Combination Variable Value
-----------------------------
0 a 1
0 b 2
1 c 3
1 d 4
2 e 5
2 f 6
...
I want to query it to get this:
Variable 0 Value 0 Variable 1 Value 1 Variable 2 Value 2 ...
---------------------------------------------------------------------------
a 1 c 3 e 5
b 2 d 4 f 6
I've tried using PIVOT with dynamic query but cannot come up with a satisfying result.
Can somebody please advise?
EDIT: though Ullas solution works perfectly for combination pairs, I was wondering if it's possible to achieve the same result with combination N-uplets (e.g. (0, 0, 0), (1, 1, 1), (2, 2, 2) should result in 3 rows)? I reckon dynamic query is still the way to go, maybe with PIVOT this time.

Answer 1

Use dynamic sql.
I just created one. Don't know how efficient it is.
Query
declare #query1 varchar(max);
declare #query2 varchar(max);
select #query1 = 'select ' +
STUFF
(
(
select distinct
',min(t.Variable' + cast(Combination as varchar(6)) + ') as Variable' +
cast(Combination as varchar(6)) +
',min(t.Value' + cast(Combination as varchar(6)) + ') as Value' +
cast(Combination as varchar(6))
from tblComb
for xml path('')
),
1,1,'');
select #query1 += ' from('
select #query1 += 'select '+
stuff
(
(
select distinct
',max(case when Combination = ' + cast(Combination as varchar(6)) +'
then Variable end) as Variable' + cast(Combination as varchar(6)) +
',max(case when Combination = ' + cast(Combination as varchar(6)) +'
then Value end) as Value' + cast(Combination as varchar(6))
from tblComb
for xml path('')
),
1, 1, '');
select #query1 += ' from tblComb group by Combination, Variable)t union all ';
select #query2 = 'select ' +
STUFF
(
(
select distinct
',max(t.Variable' + cast(Combination as varchar(6)) + ') as Variable' +
cast(Combination as varchar(6)) +
',max(t.Value' + cast(Combination as varchar(6)) + ') as Value' +
cast(Combination as varchar(6))
from tblComb
for xml path('')
),
1, 1, '');
select #query2 += ' from('
select #query2 += 'select '+
stuff
(
(
select distinct
',max(case when Combination = ' + cast(Combination as varchar(6)) +'
then Variable end) as Variable' + cast(Combination as varchar(6)) +
',max(case when Combination = ' + cast(Combination as varchar(6)) +'
then Value end) as Value' + cast(Combination as varchar(6))
from tblComb
for xml path('')
),
1, 1, '');
select #query2 += ' from tblComb group by Combination, Variable)t;';
select #query1 += #query2;
execute(#query1);
Sample table
+-------------+----------+-------+
| Combination | Variable | Value |
+-------------+----------+-------+
| 0 | a | 1 |
| 0 | b | 2 |
| 1 | c | 3 |
| 1 | d | 4 |
| 2 | e | 5 |
| 2 | f | 6 |
+-------------+----------+-------+
Result set
+-----------+--------+-----------+--------+-----------+--------+
| Variable0 | Value0 | Variable1 | Value1 | Variable2 | Value2 |
+-----------+--------+-----------+--------+-----------+--------+
| a | 1 | c | 3 | e | 5 |
| b | 2 | d | 4 | f | 6 |
+-----------+--------+-----------+--------+-----------+--------+