How to get the name and maximum sum values of points for each year?-CodePudding

This is my code so far. It's in T-SQL.

However, it only selects the item with max values for each year instead of the total points.

WITH cte as
(
   SELECT
     CONCAT(forename,' ',surname) AS driver_name,
     year,
     (CONVERT(FLOAT,points)) AS race_points,
     row_number() over (partition by year order by (CONVERT(FLOAT,points)) desc) as rn     
   FROM 
     results AS r    
     INNER JOIN constructors AS c ON r.constructorId = c.constructorId
     INNER JOIN drivers AS d ON r.driverId = d.driverId
     INNER JOIN races AS rc ON r.raceId = rc.raceId
)
SELECT * FROM cte 
WHERE rn = 1

This is how sub looks like

driver_name	year	race_points
a	2011	1
a	2011	1
b	2011	2
b	2011	2
c	2012	3
c	2012	3
d	2012	4
d	2012	4

I'm trying to make it look like this

driver_name	year	max_points
b	2011	4
d	2012	8

What I'm currently getting is this

driver_name	year	max_points
b	2011	2
d	2012	4

Any help would be really appreciated.

CodePudding user response：

You want aggregation with the window functions:

WITH cte as (
      SELECT CONCAT(forename, ' ', surname) AS driver_name,
             year, SUM(points) as race_points,
             RANK() OVER (PARTITION BY year ORDER BY SUM(points) DESC) as seqnum
      FROM results r JOIN 
           constructors c
           ON r.constructorId = c.constructorId JOIN
           drivers d
           ON r.driverId = d.driverId JOIN
           races rc
           ON r.raceId = rc.raceId
      GROUP BY CONCAT(forename, ' ', surname), year
     )
SELECT *
FROM cte
WHERE seqnum = 1;