SQL Query with drop or null on statement - mysql

Question

On a Userpage we show Awardpictures recived from 2 sql tables.
In zg15_auszeichnungen_vergeben which contains all user awards in form from award type id`s, award dates ... we read over the users pilotID the award datas.
Over a LEFT JOIN from zg15_auszeichnungen_main we get the Awardpicture and the Award Name which shows on the page.
SELECT v.pilotID, v.auszBereichID, v.auszTypID, v.gameID, v.auszDatum, m.mainGrafik, m.mainName
FROM zg15_auszeichnungen_vergeben
LEFT JOIN zg15_auszeichnungen_main m ON v.auszMainID = m.mainID
WHERE v.pilotID = '$pilotID'
AND v.auszBereichID = 6
AND v.auszTypID = 100
AND v.gameID = 1
ORDER BY v.auszDatum;
Because there are to many year awards(1 year,2years,3years...12 years) together wit some other awards, i want just show the oldest award of the years (just 12 years instead of all). The year awards have the value 11 from m.mainKatID and the oldest has the highest value from m.mainPunkte.
Other awards like (most Postpoints) have other values (10) in mainKatID.
I'm not familiar with mysql and don't get the result i want.

Answer 1

Change your ORDER BY to ORDER BY m.mainKatID DESC LIMIT 3 and set limit to return 3 records.
SELECT
v.pilotID, v.auszBereichID, v.auszTypID, v.gameID, v.auszDatum,
m.mainGrafik, m.mainName FROM zg15_auszeichnungen_vergeben v
LEFT JOIN zg15_auszeichnungen_main m ON v.auszMainID = m.mainID
WHERE v.pilotID = '$pilotID'
AND v.auszBereichID = 6
AND v.auszTypID = 100
AND v.gameID = 1
ORDER BY m.mainKatID DESC LIMIT 3

Answer 2

Use a subquery that gets the oldest year award for each mainID. Combine that with the non-year awards using UNION.
SELECT v.pilotID, v.auszBereichID, v.auszTypID, v.gameID, v.auszDatum, m.mainGrafik, m.mainName
FROM zg15_auszeichnungen_vergeben AS v
LEFT JOIN (
SELECT * FROM zg15_auszeichnungen_main
WHERE mainKatID != 11
UNION
SELECT m1.*
FROM zg15_auszeichnungen_main AS m1
JOIN (SELECT mainID, MAX(mainPunkte) AS maxPunkte
FROM zg15_auszeichnungen_main
WHERE mainKatID = 11
GROUP BY mainID) AS m2
ON m1.mainID = m2.mainID AND m1.mainPunkte = m2.maxPunkte
WHERE m1.mainKatID = 11) AS m
ON v.auszMainID = m.mainID
WHERE v.pilotID = '$pilotID'
AND v.auszBereichID = 6
AND v.auszTypID = 100
AND v.gameID = 1
ORDER BY v.auszDatum;