1.update `emailuser` set `user`=replace(`user`,' ','')//批量更新user字段中的空格
2.select name ,count(*) as count from emailuser group by name having count>//查找某个字段中某个字段的重复值
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1.update `emailuser` set `user`=replace(`user`,' ','')//批量更新user字段中的空格
2.select name ,count(*) as count from emailuser group by name having count>//查找某个字段中某个字段的重复值