select p.id,p.name,p.type,p.project_id,p.file_id, p.version,p.del_flag,p.create_by,p.create_time,p.update_by,p.update_time,p.remark,a.origin_name,a.file_name,a.path from ass_project_material p left join ass_accessory_file a on a.id=p.file_id select count(1) from ass_project_material where project_id=#{projectId} and del_flag=0 where p.project_id=#{projectId} and p.del_flag=0 where p.id=#{projectMaterialId}