Mysql 从3个select查询中获取一行结果数据

Mysql 从3个select查询中获取一行结果数据,mysql,sql,join,Mysql,Sql,Join,我有桌子: 玩家: id name 地点: id playerId tournamentId 比赛: id name prize1 prize2 prize3 查询: ( select pl.Name, pla.place,sum(t2.prize1),count(t2.name) from players pl inner join places pla on pl.id = pla.PlayerId inner join tournaments2 t

我有桌子:

玩家:

id
name
地点:

id
playerId
tournamentId
比赛:

id
name
prize1
prize2
prize3
查询:

(
    select pl.Name, pla.place,sum(t2.prize1),count(t2.name) 
    from players pl 
    inner join places pla on pl.id = pla.PlayerId
    inner join tournaments2 t2 on pla.tournamentId = t2.id 
    where pla.place = 1 
    group by pl.name
) union (
    select pl.Name, pla.place,sum(t2.prize2),count(t2.name) 
    from players pl 
    inner join places pla on pl.id = pla.PlayerId
    inner join tournaments2 t2 on pla.tournamentId = t2.id 
    where pla.place = 2 group by pl.name
) union (
    select pl.Name, pla.place,sum(t2.prize3),count(t2.name) 
    from players pl 
    inner join places pla on pl.id = pla.PlayerId
    inner join tournaments2 t2 on pla.tournamentId = t2.id 
    where pla.place = 3 group by pl.name
)
结果:

 Name       place  gold     placecount
"player1"   "1"   "1500"    "2"
"player2"   "1"   "500"     "1"
"player1"   "2"   "300"     "1"
"player1"   "3"   "200"     "1"
所需数据表示:

 name     gold1stplace 1stplacecount gold2ndplace 2ndplacecount gold3rdplace 3rdplacecount
"player1"    "1500"             "3"         "300"         "1"         "200" "1"

如何实现所需的数据表示?

应该可以使用条件聚合来解决此问题:


应该可以使用条件聚合来解决此问题:


问题是什么?我不明白如何从我现在拥有的东西中实现所需的数据表示。问题是什么?我不明白如何从我现在拥有的东西中实现所需的数据表示
SELECT
    p.name player,
    SUM(CASE WHEN pc.place = 1 THEN t.prize1 ELSE 0 END) gold1stplace,
    SUM(CASE WHEN pc.place = 1 THEN 1        ELSE 0 END) place1stcount,
    SUM(CASE WHEN pc.place = 2 THEN t.prize2 ELSE 0 END) gold2ndplace,
    SUM(CASE WHEN pc.place = 2 THEN 1        ELSE 0 END) place2ndcount,
    SUM(CASE WHEN pc.place = 3 THEN t.prize3 ELSE 0 END) gold3rdplace,
    SUM(CASE WHEN pc.place = 3 THEN 1        ELSE 0 END) place3rdcount
FROM 
    players p
    INNER JOIN places pc ON pc.playerId = p.id
    INNER JOIN tournaments t ON t.id = pc.tournamentId
GROUP BY p.name