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@langhuanamacha

sql学習＃４

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今日やったこと

・テーブルの結合
・ビューの作成

学んだこと

・unionでテーブルの結合ができる
・ビューはselect文を保存できる
・inner joinは両方で一致するデータを取得
　left joinは左側のテーブルの全データ＋右側の一致データを取得する

次やること

・サブクエリ 107~

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