Question

Consider following tables:

How to skip and take groups from the table? Tried using Row_Number() but it doesn’t help. Any ideas?

Used query

;WITH cte AS (SELECT  Room.Id,  Room.RoomName,
                 ROW_NUMBER() OVER 
                 (ORDER BY Room.Id) AS RN
         FROM    Room INNER JOIN
                 RoomDetails ON Room.Id = RoomDetails.RoomId)
SELECT  Id, RoomName
FROM    cte 
WHERE RN = 1

Answer 1

You need to use partition as part of the dense_rank function

dense_rank() over (partition by roomid) as row

see here for some more examples Windowing functions