SELECT id,keywords,from_user,create_date,create_time,course_id,course_subject_id,subject,content,content_type,is_html,is_practice FROM course_sub_subject WHERE id <40208 and active=1 and content_type=0 and course_id= ORDER BY id DESC LIMIT 1 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 'ORDER BY id DESC LIMIT 1' at line 1خطا در داده
انواع داده PHP(PHP Data Types)