A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/kddpromo/public_html/application/base/frontend/themes/midrub/contents/parts/header.php:1)

Filename: core/Common.php

Line Number: 570

Database Error

A Database Error Occurred

Error Number: 1055

Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'kddpromo_sistema.a.meta_value' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

SELECT `a`.`meta_value` AS `selected_page`, `b`.`meta_value` AS `permalink`, `c`.`meta_value` AS `class`, `classifications_meta`.*, `classifications`.`parent` FROM `classifications` LEFT JOIN `classifications_meta` ON `classifications`.`classification_id`=`classifications_meta`.`classification_id` LEFT JOIN `classifications_meta` `a` ON `classifications`.`classification_id`=`a`.`classification_id` LEFT JOIN `classifications_meta` `b` ON `classifications`.`classification_id`=`b`.`classification_id` LEFT JOIN `classifications_meta` `c` ON `classifications`.`classification_id`=`c`.`classification_id` WHERE `classifications_meta`.`meta_name` = 'name' AND `classifications`.`slug` = 'main_menu' AND `a`.`meta_name` = 'selected_page' AND `a`.`language` = 'english' AND `b`.`meta_name` = 'permalink' AND `b`.`language` = 'english' AND `c`.`meta_name` = 'class' AND `c`.`language` = 'english' AND `classifications_meta`.`language` = 'english' GROUP BY `classifications`.`classification_id` ORDER BY `classifications`.`classification_id` ASC

Filename: base/models/base_classifications.php

Line Number: 147