erreur mysql : Invalid SQL: SELECT u.*, t.* FROM travels_upc u, travels t WHERE u.country='MO' AND u.dst_1='Marrakech' AND u.UPC=t.UPC GROUP BY t.UPC ORDER BY price ASC
Addition informations : 1055 - Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'project_db.u.id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by