mysql设置sql_mode

Mysql查询报错

	 SEVERE: Servlet.service() for servlet [dispatcherServlet] in context with path [/load] threw exception [Request processing failed; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'tableName.step' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by] with root cause
	 com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'tableName.step' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

错误的原因在于Mysql的版本是5.7的

查询sql_mode

select @@sql_mode;
| @@sql_mode                                                                                                                                |
+-------------------------------------------------------------------------------------------------------------------------------------------+
| ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION |

若直接set sql_mode,则修改的是当前会话的sql_mode,我们需要修改全局sql_mode

SET @@GLOBAL.sql_mode=(SELECT REPLACE(@@GLOBAL.sql_mode,'ONLY_FULL_GROUP_BY',''));