回答編集履歴
2
追記
test
CHANGED
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@@ -49,3 +49,45 @@
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定番のパターンです。
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---
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カンマ区切りにするなら `group_concat` を使う（MySQL 限定）。
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```lang-sql
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select
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user_id, name, group_concat(sub) as sub
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from (
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select
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t.user_id, t.name, t.sub
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from
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t inner join t as t2 on t.user_id = t2.user_id
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group by
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t.id, t.user_id, t.name, t.sub, t.point
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having
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t.point = max(t2.point)
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84
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) as x
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group by
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user_id, name
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```
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1
追記
test
CHANGED
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@@ -1,4 +1,4 @@
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1
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-
サブクエリで。
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1
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相関サブクエリで max を条件にする。
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2
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3
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4
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@@ -17,3 +17,35 @@
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)
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```
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自己結合で group by ... having で絞る。
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```lang-sql
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select
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t.user_id, t.name, t.sub
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from
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t inner join t as t2 on t.user_id = t2.user_id
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group by
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t.id, t.user_id, t.name, t.sub, t.point
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having
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t.point = max(t2.point)
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```
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48
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49
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定番のパターンです。
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50
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51
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