All of the following are functions of CRM system except （）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30327' and id < 2452044 and id<>'2452044' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30327' and id > 2452044 and id<>'2452044' order by id asc limit 5