sql把查询结果作为条件进行查询

mysql 在查询结果中进行二次查询

参考链接https://blog.csdn.net/zsg88/article/details/78862852

 

第一次查询：查询身份证编号和出现次数

select cardid,count(cardid) as total from p_person_info group by cardid

在第一次查询结果进行二次查询：查询身份证出现次数大于1以上

select cardid from (select cardid,count(cardid) as total from p_person_info group by cardid) temp where temp.total>1

=====================================================