MySQL5.7のExtended Supportは2023年10月までです。これから始める場合はMySQL8.0を使いましょう。 既存のシステムのMySQLを5.6から5.7に変えて動かしたら、group by を使ったSQLでエラーが発生した。 Error Number: 1055 Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'dtabase_name.table_name.column_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by このエラーは s
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