有其他方法么?select * from acontent a where update_time='".$update_time."' and (title!=(select title from acontent where parentid=a.parentid and id<a.id order by id desc limit 1) or price!=(select price from acontent where parentid=a.parentid and id<a.id order by id desc limit 1) ) order by id desc 运行速度超慢
from acontent a
where update_time='".$update_time."' and (title!=(select title from acontent where parentid=a.parentid and id<a.id order by id desc limit 1)
or price!=(select price from acontent where parentid=a.parentid and id<a.id order by id desc limit 1) ) order by id desc 运行速度超慢