select t.real_ammeter, t.eng_region_id,a.region_name, b.device_name,t.occur_time,b.eng_device_id,b.eng_type_id
from ammeter t
inner join eng_region a on a.eng_region_id =t.eng_region_id
inner join eng_device b on b.eng_region_id =t.eng_region_id and b.eng_type_id =109
and to_char (t.occur_time,'yyyy-mm-dd')='2011-06-02'
order by t.real_ammeter desc;
图片中查出的real_ammeter值都是一样的,但是实际上不是相同的,请问以上查询语句的语法错了么?