Pivot function returning null values - sql

Question

I want to show all three rows in 1st row so i used pivot in the query
**output pic is attached **
SELECT [Container Number],ReadTimee,Locationn,Trailer FROM
(SELECT [Container Number],ReadTime,Location FROM #temp )as Tab1
PIVOT
(
MAX(ReadTime) FOR Location IN (Trailer,ReadTimee,Locationn)) AS Tab2
But using above query returning null
.The output pic is shown below
I want a output Like this
ReadTime Location Trailer Container Number ReadTime Location Trailer Container Number ReadTime Location Trailer Container Number
2019-02-27 03:17:21.033 CUSTOM 1 ZIMU1374787,TRHU3437713 2019-02-27 06:10:35.470 ZERO 1 ZIMU1374787,TRHU3437713 2019-02-27 07:30:47.407 CFS 1 ZIMU1374787,TRHU3437713

Answer 1

Try this:
SELECT Trailer, [Container Number], [CUSTOM] = MAX(CASE WHEN Location = 'CUSTOM' THEN ReadTime ELSE NULL END),
[ZERO] = MAX(CASE WHEN Location = 'ZERO' THEN ReadTime ELSE NULL END),
[CFS] = MAX(CASE WHEN Location = 'CFS' THEN ReadTime ELSE NULL END)
FROM #tmp
GROUP BY Trailer, [Container Number]
Above query returns:
Trailer Container Number CUSTOM ZERO CFS
1 ZIMU1374787,TRHU3437713 2019-02-27 03:17:21.033 2019-02-27 06:10:35.470 2019-02-27 07:30:47.407

Answer 2

You can use MAX method to get necessary columns:
SELECT
MAX(CASE WHEN q.RowNumber = 1 THEN q.ReadTime ELSE NULL END) AS ReadTime
, MAX(CASE WHEN q.RowNumber = 1 THEN q.Location ELSE NULL END) AS Location
, MAX(CASE WHEN q.RowNumber = 1 THEN q.Trailer ELSE NULL END) AS Trailer
, MAX(CASE WHEN q.RowNumber = 1 THEN q.ContainerNumber ELSE NULL END) AS ContainerNumber
, MAX(CASE WHEN q.RowNumber = 2 THEN q.ReadTime ELSE NULL END) AS ReadTime
, MAX(CASE WHEN q.RowNumber = 2 THEN q.Location ELSE NULL END) AS Location
, MAX(CASE WHEN q.RowNumber = 2 THEN q.Trailer ELSE NULL END) AS Trailer
, MAX(CASE WHEN q.RowNumber = 2 THEN q.ContainerNumber ELSE NULL END) AS ContainerNumber
, MAX(CASE WHEN q.RowNumber = 3 THEN q.ReadTime ELSE NULL END) AS ReadTime
, MAX(CASE WHEN q.RowNumber = 3 THEN q.Location ELSE NULL END) AS Location
, MAX(CASE WHEN q.RowNumber = 3 THEN q.Trailer ELSE NULL END) AS Trailer
, MAX(CASE WHEN q.RowNumber = 3 THEN q.ContainerNumber ELSE NULL END) AS ContainerNumber
FROM
(
SELECT
*
, ROW_NUMBER() OVER(PARTITION BY T.Trailer ORDER BY T.Trailer) AS RowNumber
FROM #Table AS T
)AS q
Let me show an example:
DECLARE #Table TABLE
(
ReadTime DATETIME,
[Location] VARCHAR(50),
Trailer INT,
ContainerNumber VARCHAR(50)
)
INSERT INTO #Table
(
ReadTime,
Location,
Trailer,
ContainerNumber
)
VALUES
( '2019-02-23 12:22:35.490', 'CUSTOM', 1, 'ZIMU1' )
, ( '2019-02-24 12:22:35.490', 'ZERO', 1, 'ZIMU2' )
, ( '2019-02-25 12:22:35.490', 'CFS', 1, 'ZIMU3')
And use the above query to get the desired output: