报错：SQL> SP2-0734: 未知的命令开头 "where a.de..." - 忽略了剩余的行。

问题：在数据库中查询数据，代码如下：

select count(1) from (
select a.device_id as "deviceId",
                     a.sevice_type as "seviceType",
                     a.pw_id as "pwId",
                     a.a_local_sign as "aLocalSign",
                     a.a_remote_sign as "aRemoteSign",
                     a.serv_port as "servPort",
                     a.serv_vlan as "servVlan",
                     a.status as "status",
                     a.zb_pw_flag as "zbPwFlag",
                     a.gather_time as "gatherTime",
                     a.device_name as "deviceName",
                     a.loopback_ip as "loopbackIp",
                     a.city_name as "cityName", 
                     b.portdesc as "portDesc" from (
        select

                     a.device_id,
                     a.sevice_type,
                     a.pw_id,
                     a.a_local_sign,
                     a.a_remote_sign,
                     a.serv_port,
                     a.serv_vlan,
                     a.status as,
                     a.zb_pw_flag,
                     a.gather_time,
                     b.device_name,
                     b.loopback_ip,
                     c.city_name
        from ipran_a_pw_resource a,tab_deviceresource b,tab_city c 
        where a.device_id=b.device_id and b.city_id=c.city_id 
        order by a.device_id,a.sevice_type,a.a_local_sign) a
        left join ipran_port_ip b on a.device_id=b.device_id and a.serv_port=b.portname) t

执行后报错，各种忽略了剩余的行，经过查询发现是因为sql语句里有一行空行，出现了这个问题。去掉空行后问题就解决了。