MySQL reports an error "expression 1 of select list is not in group by claim and contains nonaggre" solution

solve MySQL5.7 Use after version GROUP BY Wrong sentence

• Question why
• resolvent

Use today mysql A simple grouping query statement （GROUP BY） Wrong report .

mysql> SELECT * FROM tb GROUP BY empid;
ERROR 1055 (42000): Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'db1.tb.sales' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

Checked the cause of the problem and the solution , Successfully solved .

Question why

reason ： Use GROUP BY Statement violated sql_mode=only_full_group_by. because mysql edition 5.7 Then the default mode is ONLY_FULL_GROUP_BY. Original words of official website documents ：