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//例一：
select name1,count(*) as count from table_name group by name1 having count>1;
//例二：
select name1,name2 ,count(name1) as countb,count(name2) as count from table_name group by name1,name2 having count>1 and countb >1;
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原文地址：http://www.cnblogs.com/langtianya/p/5086651.html
