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