Question

Considering this table:

create table t (EventId    int
               ,Section    int
               ,PlayerName nvarchar(50)
               ,Score      int
               ,Rank       int
               )

I trying to writing the T-SQL that does have EventId as input and using the RANK function to rank by the score but with the sections separated (Ranking individual for each section, Rank 1 for highest score in each section and so on) and then setting/updating the Rank value

Answer 1

UPDATE tbl
SET [Rank] = t2.[Rank]
FROM tbl t1
LEFT OUTER JOIN 
(
  SELECT EventId
  , Section
  , PlayerName
  , Score
  , RANK() OVER (PARTITION BY EventId, Section ORDER BY Score desc) as [Rank]
  FROM tbl
) as t2 
  ON t1.EventId = t2.EventId 
  AND t1.Section = t2.Section
  AND t1.PlayerName = t2.PlayerName

Here it is running on SEDE.