1055 - Expression #1 of SELECT list is not in GROUP BY clause and contains解決

今天在開發過程中，由於之前項目已經開發完成，完成了數據庫遷移，今天在操作的時候，根據分組求和的時候，出現了一個錯誤：
1055 - Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'btc.a.applicant_unit' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

一番操作之后，終於找出了解決方案：
在MySQL下輸入如下語句

set sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

　　然后重新運行語句，就可以正常查詢了。