Ranking in SQL

Question

I have group of riders that log miles ridden on the website. Miles are saved and summed in a mileagelog table. Currently they are ordered by total miles by the year. New requirement is to have an indicator that show if a rider's progress in relation to others.
I can calculate their current position using this code.
declare @year int
set @year = 2014
declare @ridepost table
riderid int
, [currentspot] int
, [priorspot] int
, movement int
, [year] int
;with numberedrows
as
(SELECT m.riderid, sum(m.distancemiles) as [distance], 0 as [prior],@year as [year],
'N' as [movement], ROW_NUMBER() OVER (ORDER BY sum(m.distancemiles)desc) AS position
FROM mileagelog m
WHERE m.ridetypeid <> 7
and DATEPART(YYYY,ridedate) = @year
group by m.riderid
insert into BDUC.riderspot
select riderid
, position
, [prior]
, movement
, [year]
from numberedrows
This orders all of the riders for the year. The problem I have is how to show changes.  The table riderspot has the rider and year. ON INSERT the position column is set to their current position the prior set to 0 and the movement flag set to 'N' (new).
If a rider inserts a new mileage the prior column is set ti the previous position and the position should be set to the new position. If the new position passes one or more riders that were ahead of him his movement is set to 'U' (up) and any riders he passed
are set to 'D' (down). The ruder may also delete a ride in which case he should be flagged as 'D' (down) and those that passed him = 'U'. If he adds miles but does not pass anyone his movement = 'S' (static). And of course if he ties it is set to 'T' as is
the rider he ties with. Simple eh? Any Ideas?
This is my attempt at assigning positions...
DECLARE @riderid int
select @riderid = 670
DECLARE @year int
select @year = 2014
declare @current int
declare @prior int
declare @movement char(1)
declare @rider2 int
declare @riderspot table
rider int
, [current] int
, [prior] int
, movement char(1)
, [year] int
-- if there is a rw for the rider/year...
IF exists (select * from BDUC.riderspot where riderid = @riderid and curyear = @year )
--Update records
SELECT @prior = (SELECT currentspot from BDUC.riderspot WHERE riderid = @riderid and curyear = @year)
select @prior
DECLARE @mileagerank TABLE
( distance float
, riderid int
, rowcounter int
;with currentrows
as
(SELECT riderid, sum(distancemiles) as [distance], ROW_NUMBER() OVER (ORDER BY sum(distancemiles)desc) AS RowNumber
FROM mileagelog
WHERE DATEPART(YYYY,ridedate) = @year
AND ridetypeid <> 7
group by riderid)
insert into @mileagerank select nr.[distance], nr.riderid, nr.RowNumber from currentrows nr
JOIn riders r
on r.riderid = nr.riderid
SELECT @current = (select rowcounter from @mileagerank where riderid = @riderid )
SELECT @current
select @movement = case when @current < @prior then 'U'
WHEN @current > @prior then 'D'
WHEN @current = @prior then 'S'
ELSE 'N'
END
SELECT @movement
UPDATE BDUC.riderspot
SET currentspot = @current
, priorspot = @prior
, movement = @movement
WHERE riderid = @riderid
and curyear = @year

Answer 1

Dave,
Read about different ranking functions in sql server in an article I wrote here..
http://sqlsaga.com/sql-server/what-is-the-difference-between-rank-dense_rank-row_number-and-ntile-in-sql-server/
If you have posted some sample DDL and DML, it would have been much easier to help you than work with the actual query...
Please mark as answer, if this has helped you solve the issue.
Good Luck :) .. visit www.sqlsaga.com for more t-sql code snippets and BI related how to articles.