SQL Server 2008 Flatten Rows - sql-server

Question

I need to flatten a record set that originally has 4 rows per user to be 1 row. I started using the PIVOT functionality but there are 2 fields that need to be flatten (and the pivot wasn't working as expected ).
The current data structure:
ContactEmail Scenario TRE Updated_On
-------------------------------------------------------------
email#email.com WTD 0.9785 2015-05-12 22:35:14.993
email#email.com MTD 0.9817 2015-05-12 22:35:57.780
email#email.com QTD 0.9542 2015-05-12 23:16:35.227
email#email.com YTD 0.9522 2015-05-12 23:39:56.533
The result should be:
ContactEmail WTD_TRE WTD_TRE_Updated MTD_TRE MTD_TRE_Updated QTD_TRE QTD_TRE_Updated YTD_TRE YTD_TRE_Updated
--------------------------------------------------------------------------------------------------------------------
email#email.com 0.9785 2015-05-12 0.9817 2015-05-12 0.9542 2015-05-12 0.9522 2015-05-12
If you're curious about the PIVOT I tried, here it is (the TRE_* were all null)
SELECT *
FROM (SELECT ContactEmail, Round((ISNULL(TRE, 0) * 100), 1) AS "TRE", Scenario, Updated_On
FROM [server].[db].[schema].[table]) AS TREData
PIVOT
(
SUM(TRE)
FOR Scenario
IN ([TRE_WTD],[TRE_MTD],[TRE_QTD],[TRE_YTD])
) AS PivotTable;

Answer 1

Create two pivot queries and join them...
WITH CurrentDataStructure as (
SELECT 'email#email.com' ContactEmail,
'WTD' Scenario,
0.9785 TRE,
'2015-05-12 22:35:14.993' Updated_On
UNION SELECT 'email#email.com', 'MTD', 0.9817, '2015-05-12 22:35:57.780'
UNION SELECT 'email#email.com', 'QTD', 0.9542, '2015-05-12 23:16:35.227'
UNION SELECT 'email#email.com', 'YTD', 0.9522, '2015-05-12 23:39:56.533'
), TREData as (
SELECT ContactEmail, Round((ISNULL(TRE, 0) * 100), 1) TRE, Scenario, Updated_On
FROM CurrentDataStructure
), TREs AS (
SELECT *
FROM (SELECT ContactEmail, Scenario, TRE FROM TREData) TREData
PIVOT
(
SUM(TRE)
FOR Scenario
IN ([WTD],[MTD],[QTD],[YTD])
) PivotTable
), TREsUpdated AS (
SELECT *
FROM (SELECT ContactEmail, Scenario, Updated_On FROM TREData) TREData
PIVOT
(
MAX(Updated_On)
FOR Scenario
IN ([WTD],[MTD],[QTD],[YTD])
) PivotTable
)
SELECT t.ContactEmail,
t.WTD WTD_TRE, u.WTD WTD_TRE_Updated,
t.MTD MTD_TRE, u.MTD MTD_TRE_Updated,
t.QTD QTD_TRE, u.QTD QTD_TRE_Updated,
t.YTD YTD_TRE, u.YTD YTD_TRE_Updated
FROM TREs as t
INNER JOIN
TREsUpdated as u
ON t.ContactEmail = u.ContactEmail
This is tested through and should run just like it is.