SQLSTATE[42000]: Syntax error or access violation: 1055（sql_mode=only_full_group_by）

表现为：

SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'tlslyzx_com.xf_orders.pay_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

解决办法：

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