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[Tips]Redshiftで文字列の末尾を削除する

Last updated at Posted at 2017-09-06

末尾からn文字分だけ削除した文字列を取得する。

-- 2文字削除の場合
SELECT SUBSTRING('abcdef', 1, CHAR_LENGTH('abcdef')-2));
> abcd

-- 3文字削除の場合
SELECT SUBSTRING('abcdef', 1, CHAR_LENGTH('abcdef')-3));
> abc

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