MySQL 日時ごとの集計まとめ - Qiita月別、日別、時間別にレコード数を集計 一月毎 mysql> SELECT DATE_FORMAT(カラム１, '%Y-%m') AS time, COUNT(*) AS count FROM テーブル名 GROUP BY DATE_FORMAT(カラム１, '%Y%m'); 一日毎 mysql> SELECT DATE_FORMAT(カラム１, '%Y-%m-%d') AS time, COUNT(*) AS count FROM テーブル名 GROUP BY DATE_FORMAT(カラム１, '%Y%m%d'); 一時間毎 mysql> SELECT DATE_FORMAT(カラム１, '%Y-%m-%d %H:00:00') AS time, COUNT(*) AS count FROM テーブル名 GROUP BY DATE_FORMAT(カラム１, '%Y%m%d%H'); 30
