（）结构中每个职员都有一个明确的上级。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='27064' and id < 2243533 and id<>'2243533' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27064' and id > 2243533 and id<>'2243533' order by id asc limit 5