MySQL GROUP BYしたらエラーになった
お久しぶりのMySQL。 MySQLで重複してるデータを取ろうとしました。 SELECT * FROM table_a GROUP BY name HAVING COUNT(*) >= 2; Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.table_a.id' which is not functionally dependent on columns in GROUP BY clause; thi…
