一个表有一列列名为destaddr,里面存了很多手机号码,可能有重复的手机号码,我要怎么才能查询出这些重复的手机号码?
小菜鸟先在这谢谢大牛了!
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- SQL code
select * from tb where destaddr in (select destaddr from tb group by destaddr having count(1)>1)
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select destaddr from tb group by destaddr having count(*)>1
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