（） is a collection of data sets； which is so large and complex tbatit becomes difficult to process using on-hand database management tools or traditional data processing applications. （） 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30327' and id < 2452051 and id<>'2452051' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30327' and id > 2452051 and id<>'2452051' order by id asc limit 5