如何将ExCel中的日期数据“2017/7/2”改为“星期日”？（ )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31815' and id < 2542818 and id<>'2542818' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31815' and id > 2542818 and id<>'2542818' order by id asc limit 5