邮件合并的基本流程是 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29839' and id < 2421761 and id<>'2421761' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29839' and id > 2421761 and id<>'2421761' order by id asc limit 5