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RailsでDISTINCT ON を実行した時のまとめ

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railsでモデルからデータを取得したい場合にテーブルから重複したカラムをまとめて、
他のレコードもほしい!っていうときに

qiita_controller.rb
@hoge = Model.select("DISTINCT ON (hoge) *")

disitinct on は便利でした!

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