LEFT JOIN ( SELECT t3.class_id, sum( 1 ) AS cnt FROM class_member_mapping t3 WHERE t3.delete_date IS NULL GROUP BY t3.class_id ) t4 ON t.id = t4.class_id
LEFT JOIN course_content t2 ON t.course_id = t2.course_id
LEFT JOIN vod_dict t3 ON t2.id = t3.content_id
WHERE
t.delete_date IS NULL
AND t2.delete_date IS NULL
and t.company_id = #{companyId}
and t.class_name like concat('%',#{className} ,'%')