Answers for "Error Code: 1055. Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column '' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by"

Error Code: 1055. Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column \\ which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));
#then reconnect in mysqlworkbench or restart mysql with: service mysql restart

f SELECT list is not in GROUP BY clause and contains nonaggregated column 'safir_erp_online_ro_rft2020.leave_requests.end_at' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by on lin

If you have persistent problems on MAC
Just find my.cnf file (for big sur is in /usr/local/etc), open it and add:
[mysqld]
sql_mode = STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION