select rows where a change in column value happens - sql

Question

I have the following data shown below. It was produced by the following query:
;with noms as
(
select DateS, Region, Sales from tblSalesRegion
where Id = 'B2PM'
)
select * from
noms as source pivot (max(Sales) for Region in ([UK],[US],[EUxUK],[JAP],[Brazil])) as pvt
order by DateS
Data:
DateS UK US EUxUK JAP Brazil
2015-11-24 23634 22187 NULL NULL NULL
2015-11-30 23634 22187 NULL NULL NULL
2015-12-01 23634 22187 NULL NULL NULL
2015-12-02 23634 22187 NULL NULL NULL
2015-12-03 23634 22187 NULL NULL NULL
2015-12-04 56000 22187 NULL NULL NULL
2015-12-07 56000 22187 NULL NULL NULL
2015-12-08 56000 22187 NULL NULL NULL
2015-12-09 56000 22187 NULL NULL NULL
2015-12-10 56000 10025 NULL NULL NULL
2015-12-11 56000 10025 NULL NULL NULL
2015-12-14 56000 10025 NULL NULL NULL
Below is the result I'm after. So basically when one of the values changes in one of the five columns (excluding the dateS column) I want that to be shown. Is there a way to do this in Sql? As I need the date I don't think a simple group by statement would work. Also be nice if I could change the NULL's to zeros
Result I'm looking for:
DateS UK US EUxUK JAP Brazil
2015-11-24 23634 22187 0 0 0
2015-12-04 56000 22187 0 0 0
2015-12-10 56000 10025 0 0 0

Answer 1

Seems like a simple GROUP BY is what you want:
;WITH noms AS
(
SELECT DateS, Region, Sales
FROM tblSalesRegion
WHERE Id = 'B2PM'
)
SELECT MIN(DateS), [UK],[US],[EUxUK],[JAP],[Brazil]
FROM (
SELECT DateS,
COALESCE([UK], 0) AS [UK],
COALESCE([US], 0) AS [US],
COALESCE([EUxUK], 0) AS [EUxUK],
COALESCE([JAP], 0) AS [JAP],
COALESCE([Brazil], 0) AS [Brazil]
FROM noms AS source
PIVOT (
MAX(Sales) FOR Region IN ([UK],[US],[EUxUK],[JAP],[Brazil])) AS pvt
) AS t
GROUP BY [UK],[US],[EUxUK],[JAP],[Brazil]
ORDER BY MIN(DateS)