応用情報技術者令和元年秋期 午前問27
当該質問としては、簡単ですね。
ただ、質問に書いている、INTERSECT、RESTRICT 私も使ったことがないですね。
INTERSECT例：
図From:https://www.ap-siken.com/kakomon/01_aki/q27.html
https://www.shift-the-oracle.com/sql/intersect-operator.html
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