Pivoting a table in sql - sql

Question

I want same output shown in Output table. I have TableA and I want to pivote it and want output table as shown in image.
Thanks
I have a table #tableA
+-----+-------------+-------+------------+
| A | Allocations | Seats | EndDate |
+-----+-------------+-------+------------+
| ABC | 450 | 23 | 2017-10-05 |
| ABC | 23 | 765 | 2017-05-01 |
| PQR | 54 | 34 | 2017-07-04 |
| ABC | 234 | 45 | 2017-11-27 |
| PQR | 987 | 76 | 2017-03-05 |
| ABC | 76 | 65 | 2017-02-23 |
| PQR | 89 | 324 | 2017-08-14 |
| ABC | 45 | 34 | 2017-07-13 |
+-----+-------------+-------+------------+
Which can be created and populated as below.
CREATE TABLE #TableA
(
A VARCHAR(50),
Allocations INT,
Seats INT,
EndDate DATETIME
);
INSERT INTO #TableA
VALUES ('ABC',450,23,'2017-10-05'),
('ABC',23,765,'2017-05-01'),
('PQR',54,34,'2017-07-04'),
('ABC',234,45,'2017-11-27'),
('PQR',987,76,'2017-03-05'),
('ABC',76,65,'2017-02-23'),
('PQR',89,324,'2017-08-14'),
('ABC',45,34,'2017-07-13');
A column has ABC and PQR unique values.
Datetime column has multiple values.
How can I get the following output?
Datetime all Datetime values from TableA in column.
Output :-
date | 2017-12-13 | 2017-12-20 | 2017-12-27 | -|-|-|-|-|-|-|-|-|
-------------------------------------------------------------------------------
A | ABC | ABC | ABC |
Allocations | 50 | 50 | 50 |
Seats | 27 | 27 | 27 |
A | PQR | PQR | PQR |
Alloc | 50 | 50 | 50 |
Seats | 12 | 12 | 12 |

Answer 1

This is something that you should do in the reporting layer not SQL.
It is possible in SQL (demo) but not something that SQL is designed to do.
WITH T
AS (SELECT A,
thing,
priority,
value,
d
FROM #TableA
CROSS APPLY (VALUES(CAST(EndDate AS DATE)))D(d)
CROSS APPLY (VALUES(1, 'A', NULL),
(2, 'Allocations', Allocations),
(3, 'Seats', Seats)) V(priority, thing, value))
SELECT thing,
case when thing = 'A' THEN A ELSE CAST(ISNULL([2017-02-23],0) AS VARCHAR(50)) END AS [2017-02-23],
case when thing = 'A' THEN A ELSE CAST(ISNULL([2017-03-05],0) AS VARCHAR(50)) END AS [2017-03-05],
case when thing = 'A' THEN A ELSE CAST(ISNULL([2017-05-01],0) AS VARCHAR(50)) END AS [2017-05-01],
case when thing = 'A' THEN A ELSE CAST(ISNULL([2017-07-04],0) AS VARCHAR(50)) END AS [2017-07-04],
case when thing = 'A' THEN A ELSE CAST(ISNULL([2017-07-13],0) AS VARCHAR(50)) END AS [2017-07-13],
case when thing = 'A' THEN A ELSE CAST(ISNULL([2017-08-14],0) AS VARCHAR(50)) END AS [2017-08-14],
case when thing = 'A' THEN A ELSE CAST(ISNULL([2017-10-05],0) AS VARCHAR(50)) END AS [2017-10-05],
case when thing = 'A' THEN A ELSE CAST(ISNULL([2017-11-27],0) AS VARCHAR(50)) END AS [2017-11-27]
FROM T
PIVOT (SUM(value) FOR d in (
[2017-02-23],
[2017-03-05],
[2017-05-01],
[2017-07-04],
[2017-07-13],
[2017-08-14],
[2017-10-05],
[2017-11-27])) P
ORDER BY A, priority
The above doesn't even address the dynamic aspect. For that you would need to generate a dynamic SQL string based on the above and the dates in #TableA