笨刪除查詢不能

Question

我需要在time.Here刪除從三個表中的記錄是我的查詢： -

$query =$this->db->query("DELETE ps_faq_categories FROM ps_faq_categories INNER JOIN ps_faqs ON('ps_faq_categories.faq_category_id = ps_faqs.faq_category_id') 
        INNER JOIN ps_faq_comments ON('ps_faqs.faq_id = ps_faq_comments.faq_id') WHERE 'ps_faq_categories.faq_category_id' = $category_id"); 

我收到錯誤，如在指定的上下文非布爾類型的表達式「INNER」附近預計會出現一種情況。

Answer 1

從查詢

$query =$this->db->query("DELETE ps_faq_categories,ps_faqs,ps_faq_comments FROM ps_faq_categories INNER JOIN ps_faqs ON(ps_faq_categories.faq_category_id = ps_faqs.faq_category_id) 
        INNER JOIN ps_faq_comments ON(ps_faqs.faq_id = ps_faq_comments.faq_id) WHERE ps_faq_categories.faq_category_id = $category_id");