Pivot表格成多列多行

Question

Background I am have a table which contains a varchar with a comma separated string (which has multiple rows similar to this question. Unfortunately I haven't been able to find a way to change a csv varchar into a temp table simply so I am looking into splitting it up myself. (I would also appreciate any answers tackling this, although maybe it should be a separate question?).

Question

I have successfully split the string up and am now producing an output similar to:

   -------------------------------------
   | Row Index  | Column Index | Value |
   -------------------------------------
   |     0      |      0       | (0,0) |
   |     0      |      1       | (1,0) |
   |     0      |      2       | (2,0) |
   |     1      |      0       | (0,1) |
   |     1      |      1       | (1,1) |
   |     1      |      2       | (2,1) |
   |     2      |      0       | (0,2) |
   |     2      |      1       | (1,2) |
   |     2      |      2       | (2,2) |
   -------------------------------------

I would like to pivot this so that I can insert it into a temp table and the final result would look like:

   -------------------------------------
   | Column 1  | Column 2  | Column 3  |
   -------------------------------------
   |   (0,0)   |   (1,0)   |   (2,0)   |
   |   (0,1)   |   (1,1)   |   (2,1)   |
   |   (0,2)   |   (1,2)   |   (2,2)   |
   -------------------------------------

Asides

1. The number of columns is known ahead of time but answers which don't depend on this are also welcome.
2. I know that I could repeatedly left outer join the first table to get this result but this requires outer joining once for every column (as I have ~9 columns this will be a lot of repetition) and I assume that there is another way.
3. Performance is not key but there will be ~2000 rows with 8 columns in the final table.

Answer 1

using conditional aggregation:

select 
    RowIndex
  , Column1 = max(case when ColumnIndex=0 then Value end)
  , Column2 = max(case when ColumnIndex=1 then Value end)
  , Column3 = max(case when ColumnIndex=2 then Value end)
from t
group by RowIndex

rextester demo: http://rextester.com/QLPHR39222

returns:

+----------+---------+---------+---------+
| RowIndex | Column1 | Column2 | Column3 |
+----------+---------+---------+---------+
|        0 | (0,0)   | (1,0)   | (2,0)   |
|        1 | (0,1)   | (1,1)   | (2,1)   |
|        2 | (0,2)   | (1,2)   | (2,2)   |
+----------+---------+---------+---------+

---

or with pivot() :

select 
    RowIndex
  , Column1 = [0]
  , Column2 = [1]
  , Column3 = [2]
from t
pivot (max(Value) for ColumnIndex in ([0],[1],[2])) p

Answer 2

This is a straightforward application of a PIVOT query ( See The Docs ):

select x.[0] Column1
     , x.[1] Column2
     , x.[2] Column3
  from YourData
 pivot (max(Value)
   for [Column Index]
    in ([0], [1], [2]) ) x
 order by x.[Row Index]

which Returns:

| Column1 | Column2 | Column3 |
|---------|---------|---------|
|   (0,0) |   (1,0) |   (2,0) |
|   (0,1) |   (1,1) |   (2,1) |
|   (0,2) |   (1,2) |   (2,2) |

SQL Fiddle

To add more columns simply add more column indexes to the FOR column IN (list) section, and add the same values to the projection (select list)

Answer 3

I have a very similar question to this but the only difference is I have more than 3 in Rox index basically have 4 million and column index has more than 0,1 2 which is a rep_name field and can have more than 100 and keeps changing as new reps add or remove. Value field should be filtered to have only 3 types of teams and should be pivoted and merged to have ex: 'X_team & Y team' by each row index