如果全集 ，设集合 ，则集合 ="(    " )

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='15528' and id < 2627643 and id<>'2627643' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='15528' and id > 2627643 and id<>'2627643' order by id asc limit 5