回答編集履歴
1
追記
test
CHANGED
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@@ -21,3 +21,25 @@
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21
21
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P1.POSITION = P2.POSITION
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AND P1.HEIGHT = P2.MAX_HEIGHT
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```
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24
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### 追記
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25
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どうしても SELECT 句の中に副問い合わせを書きたいのであれば、副問い合わせが必ず１行以下になるような工夫が必要です。
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26
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下の例では名前の最大値をもってきています。
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27
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```SQL
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28
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SELECT
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P1.POSITION
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, P1.MAX_HEIGHT
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, (SELECT MAX(P2.NAME) FROM PLAYERS P2
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WHERE P2.POSITION = P1.POSITION
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AND P2.HEIGHT = P1.MAX_HEIGHT) NAME
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FROM
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(
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SELECT
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POSITION
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, MAX(HEIGHT) MAX_HEIGHT
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FROM
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PLAYERS
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GROUP BY
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POSITION
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) P1
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```
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45
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