Pesan Kesalahan 500

CDbCommand gagal menjalankan statementSQL: SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #3 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'appe.P.atas_harga_berlaku' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by