mysql学习第9篇：MySQL 5.7.9版本sql_mode=only_full_group_by问题

Posted 2021-01-28 康琛

MySQL 5.7.9版本sql_mode=only_full_group_by问题

用到GROUP BY 语句查询时com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column \'col_user_6.a.START_TIME\' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by错误

 

解决方法 (修改全局)：执行set global   sql_mode = \'\'; 把sql_mode 改成非only_full_group_by模式。验证是否生效 SELECT @@GLOBAL.sql_mode 或 SELECT @@sql_mode

 

执行（只是修改会话级别的，只是当前会话生效）set  session sql_mode = \'\'; 把sql_mode 改成非only_full_group_by模式。验证是否生效 SELECT @@GLOBAL.sql_mode 或 SELECT @@sql_mode