只能归于某一有序类别的非数字型数据称为（）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30461' and id < 2461096 and id<>'2461096' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30461' and id > 2461096 and id<>'2461096' order by id asc limit 5