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查询一个表中的两个字段值相同的数据

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Release： 2016-06-07 14:57:49
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查询一个表中的两个字段值相同的数据 无 #查询一个表中的两个字段值相同的数据select p1.cityname from forecast p1,forecast p2 where p1.cityname=p2.cityname and p1.cityname=p2.cityname and p1.id!=p2.id;

查询一个表中的两个字段值相同的数据 
#查询一个表中的两个字段值相同的数据
select p1.cityname from forecast p1,forecast p2 where p1.cityname=p2.cityname and p1.cityname=p2.cityname and p1.id!=p2.id;
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