insert 0 into successive row with same fields value - sql

Question

I have a table containing the following line:
I'd like to create a view that displays the following result (without changing my original table) :
For each line having the same id,day,month and year I'd like to leave a single line with the cost and count and insert 0 in the others.

Answer 1

Here is a portable approach not requiring PARTITION. I have assumed you will not have the same datetimeIN value for more than one row in a group:
select t.id, t.day, t.month, t.year,
case when tm.id is null then 0 else t.cost end as cost,
case when tm.id is null then 0 else t.Count end as Count,
t.datetimeIN, t.datetimeOUT
from MyTable t
left outer join (
select id, day, month, year, min(datetimeIN) as minIN
from MyTable
group by id, day, month, year
) tm on t.id = tm.id
and t.day = tm.day
and t.month = tm.month
and t.year = tm.year
and t.datetimeIN = tm.minIN

Answer 2

You can do something like this:
SELECT id, day, month, year,
CASE WHEN nNum = 1 then cost else 0 end as cost,
CASE WHEN nNum = 1 then "Count" else 0 end as "Count",
datetimeIN, datetimeOUT
FROM (
SELECT id, day, month, year,
cost, "Count", datetimeIN, datetimeOUT,
row_number() OVER (PARTITION BY id, day, month, year
ORDER BY datetimeIN) as nNum
FROM TableName
) A
It uses row_number() to number the rows, and then a CASE statement to single out the first one and make it behave differently.
See it working on SQL Fiddle here.

Answer 3

or, using a common table expression:
with commonTableExp ([day], [month], [year], minDate) as (
select [day], [month], [year], min(datetimeIn)
from #temp
group by [day], [month], [year])
select id,
dt.[day],
dt.[month],
dt.[year],
case when datetimein = minDate then [cost] else 0 end,
case when datetimein = minDate then [count] else 0 end,
dateTimeIn
from #temp dt join commonTableExp cte on
dt.[day] = cte.[day] and
dt.[month] = cte.[month] and
dt.[year] = cte.[year]
order by dateTimeIn

Answer 4

Query
Select id, [day], [month], [year], Case When K.RowID = 1 Then [cost] Else 0 End as Cost, Case When K.RowID = 1 Then [count] Else 0 End as [count], [DateTimeIN], [DateTimeOut] From
(
select ROW_NUMBER() Over(Partition by id, [day], [month], [year] Order by ID ) as RowID, * From Testing
)K
Drop table Testing
Click here to see SQL Profiler details for Red Filter's Query
Click here to see SQL Profiler details for my Query
For More Information You can see SQL Fiddle