SQL Get most frequent value from a column based on a condition - mysql

Question

This query
SELECT
PlayerID, HeroTypeID, HeroTypeIDCount, Wins / (Losses + Wins) AS WinRate, Wins, Losses
FROM (
SELECT E.PlayerID AS PlayerID,
FK_HeroTypeID AS HeroTypeID,
COUNT(FK_HeroTypeID) AS HeroTypeIDCount,
SUM(CASE WHEN D.Result = 'LOSS' THEN 1 ELSE 0 END) AS Losses,
SUM(CASE WHEN D.Result = 'WIN' THEN 1 ELSE 0 END) AS Wins
FROM GamePlayerDetail D
JOIN Player E
ON D.FK_PlayerID = E.PlayerID
JOIN Game I
ON D.FK_GameID = I.GameID
WHERE PlayedDate BETWEEN DATE_SUB(CURDATE(), INTERVAL 7 DAY) AND CURDATE()
GROUP BY E.PlayerID, FK_HeroTypeID
) AS T
ORDER BY PlayerID
produces the following result:
# PlayerID, HeroTypeID, HeroTypeIDCount, WinRate, Wins, Losses
'1', '11', '1', '1.0000', '1', '0'
'1', '13', '3', '0.3333', '1', '2'
'1', '24', '5', '0.8000', '4', '1'
'1', '27', '1', '1.0000', '1', '0'
'2', '28', '1', '0.0000', '0', '1'
'2', '6', '1', '0.0000', '0', '1'
'2', '30', '1', '0.0000', '0', '1'
'2', '7', '1', '1.0000', '1', '0'
What I'd like to do is get the most frequent FK_HeroTypeID (which is also highest value of HeroTypeIDCount) per PlayerID, but in case of ties, the highest winrate should take precedence. Here's an example of what I'd like to get:
PlayerID, HeroTypeID, HeroTypeIDCount, WinRate, Wins, Losses
1, 24, 5, 0.8000, 4, 1
2, 7, 1, 1.0000, 1, 0
How should you write a query like this?
Edit:
Ok, here's a simple Create/Insert table for the produced result.
http://sqlfiddle.com/#!9/d644a

Answer 1

SELECT playerid
, herotypeid
, herotypeidcount
, winrate
, wins
, losses
FROM
( SELECT *
, CASE WHEN #prev=playerid THEN #i:=#i+1 ELSE #i:=1 END rank
, #prev:=playerid prev
FROM table1
, (SELECT #prev:=null,#i:=0) vars
ORDER
BY herotypeidcount DESC
, winrate DESC
) x
WHERE rank = 1;
Here's a 'hack' solution. It works, but really shouldn't be relied upon...
SELECT *
FROM
( SELECT *
FROM table1
ORDER
BY herotypeidcount DESC
, winrate DESC
) x
GROUP
BY playerid