SELECT and GROUP BY multiple columns based on Max() - mysql

Question

Current Table Events:
| eventId | personId | type | title | score |
+-----------+------------+--------+---------+---------+
| 1 | 1 | movie | Mission | 12 |
| 2 | 1 | movie | UNCLE | 32 |
| 3 | 1 | show | U2 | 17 |
| 4 | 1 | show | Leroy | 13 |
| 5 | 2 | movie | Holmes | 19 |
| 6 | 2 | movie | Compton | 14 |
| 7 | 2 | show | Imagine | 22 |
| 8 | 2 | show | Kane | 22 |
MySQL Example:
SELECT #personId:=personId as personId,
(
SELECT title FROM Events
WHERE rate = (SELECT MAX(score) FROM Events)
AND type = ‘movie’ AND personId=#personId
) as movie,
(
SELECT title FROM Events
WHERE rate = (SELECT MAX(score) FROM Events)
AND type = ‘movie’ AND personId=#personId
) as show,
FROM Events
GROUP BY personId
ORDER BY personId;
Desired Output:
| personId | movie | show |
+------------+----------+---------+
| 1 | UNCLE | U2 |
| 2 | Holmes | Imagine |
The desired result is to show the MAX() score for movie and show per personId in the Events table. My actual output contains NULLS and takes a very long time to load. My actual Events table has around 20,000 entries.
UPDATE Solution (derived from first two answers to increase performance)
SELECT e.personId,
(
SELECT o.title
FROM Events o
LEFT JOIN Events b
ON o.personId = b.personId AND o.score < b.score
AND o.type = b.type
WHERE o.type = 'movie' AND o.personId=e.personId LIMIT 1
) as best_movie ,
(
SELECT o.title
FROM Events o
LEFT JOIN Events b
ON o.personId = b.personId AND o.score < b.score
AND o.type = b.type
WHERE o.type = 'show' AND o.personId=e.personId LIMIT 1
) as best_show
FROM Events e
GROUP BY e.personId
ORDER BY e.personId

Answer 1

I made few modifications to your query.
Have a look:
SELECT #personId:=personId as personId,
(
SELECT title FROM Events
WHERE score = (SELECT MAX(score) FROM Events WHERE type = 'movie'
AND personId=#personId)
AND type = 'movie' AND personId=#personId LIMIT 1
) as movie ,
(
SELECT title FROM Events
WHERE score = (SELECT MAX(score) FROM Events WHERE type = 'show'
AND personId=#personId)
AND type = 'show' AND personId=#personId LIMIT 1
) as show1
FROM Events
GROUP BY personId
ORDER BY personId

Answer 2

I am not sure if it is exactly what you need.
But just my guess, probably you don't need multiple columns?
http://sqlfiddle.com/#!9/04b27/4
SELECT e.*
FROM `events` e
left join `events` e1
on e.type = e1.type
and e.score<e1.score
WHERE e1.eventId IS NULL
GROUP BY personId, type, score
Update If you need the max score per person + type you can
http://sqlfiddle.com/#!9/04b27/13
SELECT e.*
FROM `events` e
left join `events` e1
on e.personId = e1.personId
and e.type = e1.type
and e.score<e1.score
WHERE e1.eventId IS NULL
GROUP BY personId, score