Mysql解決SELECT list is not in GROUP BY clause and contains nonaggregated column 問題

在使用GROUP BY對Mysql的數據表進行查詢時若是出現如下錯誤mysql select * from user group by age; ERROR 1055 (42000): Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.user.user_i
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