Question

Is there any possibility to use something linke having() within a min() aggregate inline?

select distinct
  "timestamp"
  , MinActiveValue = min( "value" ) over ( partition by "timestamp" ) having ( "active" = 1 )
from
  "data"

In the linked example below, things work well using the first query.
Indeed, i don’t want to have to use the where clause for min-condition, since i would destroy data-filtering used in the same query. ( there are some grouped sums calculated by the same query for example )

SQL Fiddle Link

Answer 1

Perhaps this:

WITH CTE AS
(
   SELECT DISTINCT
      timestamp
    , active
    , value
    , RN = ROW_NUMBER() OVER ( PARTITION BY timestamp ORDER BY active DESC,value ASC )
  FROM
    data
)
SELECT timestamp, value AS MinActiveValue
FROM CTE
WHERE RN = 1 AND active = 1

Here you can apply your filter in the CTE itself.

Demo