Pivot Header Data in row using sql server - sql

Question

Is there any way to make table pivot in sql server like such a way.
I have data like
| OldItem | NewItem |
---------------------
| HD1 | 365 |
I need output like below.
| Name | Value1 |
---------------------
| OldItem | HD1 |
| NewItem | 365 |
Thanks in advance.

Answer 1

Please try using UNPIVOT. Sample given is for static two rows.
SELECT Name, Value1
FROM
(SELECT *
FROM tbl) p
UNPIVOT
(Value1 FOR Name IN
(OldItem, NewItem)
)AS unpvt;

Answer 2

The following works for me:
Create Table #Values (OldItem char(3),NewItem int);
INSERT INTO #Values (OldItem, NewItem)
VALUES ('HD1',365)
,('HD2',300)
,('HD3',200);
With Values_Ordered AS
(
SELECT OldItem, NewItem, row_number() OVER (ORDER BY OldItem) AS Sequence
FROM #Values
)
SELECT 'OldItem' AS Name,
min(CASE WHEN Sequence = 1 THEN OldItem ELSE NULL END) AS Value1,
min(CASE WHEN Sequence = 2 THEN OldItem ELSE NULL END) AS Value2,
min(CASE WHEN Sequence = 3 THEN OldItem ELSE NULL END) AS Value3
FROM Values_Ordered
UNION ALL
SELECT 'NewItem' AS Name,
min(CASE WHEN Sequence = 1 THEN CAST(NewItem AS CHAR(3)) ELSE NULL END) AS Value1,
min(CASE WHEN Sequence = 2 THEN CAST(NewItem AS CHAR(3)) ELSE NULL END) AS Value2,
min(CASE WHEN Sequence = 3 THEN CAST(NewItem AS CHAR(3)) ELSE NULL END) AS Value3
FROM Values_Ordered

Answer 3

And here is my little code :D
DECLARE #dataTable TABLE (OldItem VARCHAR(10), NewItem INT)
INSERT INTO #dataTable SELECT 'HD1', 365
INSERT INTO #dataTable SELECT 'HD2', 300
INSERT INTO #dataTable SELECT 'HD3', 200
INSERT INTO #dataTable SELECT 'HD4', 200
--first select data what you need and add upcoming new column name
SELECT 'Value' + CAST(ROW_NUMBER() OVER (ORDER BY OldITem) AS VARCHAR) AS NewColumn, 'OldItem' as RowName, OldItem AS Item
INTO #SelectedData
FROM #dataTable
WHERE OldItem IN ('HD1', 'HD2', 'HD3')
UNION ALL
SELECT 'Value' + CAST(ROW_NUMBER() OVER (ORDER BY OldITem) AS VARCHAR) AS NewColumn, 'NewItem' as RowName, CAST(NewItem AS VARCHAR) AS Item
FROM #dataTable
WHERE OldItem IN ('HD1', 'HD2', 'HD3')
--Collect what column names will be
DECLARE #columns NVARCHAR(MAX) = (
SELECT STUFF(
(SELECT DISTINCT ', [' + NewColumn + ']'
FROM #SelectedData
FOR XML PATH ('')),
1, 2, '' )
)
-- create dynamic code for pivot
DECLARE #dynamicSQL AS NVARCHAR(MAX);
SET #dynamicSQL = N'
SELECT RowName, ' + #columns + '
FROM #SelectedData
PIVOT (MIN(Item) FOR NewColumn IN (' + #columns + ')) AS T
';
EXEC sp_executesql #dynamicSQL