1055 Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'slenderc_slenderhk.p.products_model' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
p.products_tax_class_id from products p left join manufacturers m using(manufacturers_id) left join specials s on p.products_id = s.products_id, products_description pd, categories c, products_to_categories p2c where p.products_status = '1' and
p.products_id = pd.products_id
and pd.language_id = '1'
and p.products_id = p2c.products_id
and p2c.categories_id = c.categories_id group by pd.products_name order by pd.products_name limit 0, 20]