Hata Olu┼čtu

select t3.material_id as id, t3.title from collection_products t1 left join product_materials t2 on t1.product_id = t2.product_id left join material_details t3 on t2.material_id = t3.material_id where t1.collection_id in () and t3.lang = 'tr' group by t3.material_id

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') and t3.lang = 'tr' ' at line 9