MySQL COUNT（*）中的最后一项结果？

Question

快速的问题......我有检查重复，看起来像这样的查询：

SELECT COUNT(*) AS repetitions, Name, Phone, ID, categoryid, State 
FROM users 
GROUP BY Name, Phone, State 
HAVING repetitions > 1 
ORDER BY ID DESC 

这个工作，但MySQL的一组重复的返回第一个ID。例如，让我说我有2行。第一行的ID是1，第二行的ID是2，名称，电话和状态具有相同的数据...我如何获得上述查询返回计数但ID为“2”而不是“1”？

谢谢！ ;）

Answer 1

使用MAX（）聚合函数：

SELECT COUNT(*) AS repetitions, max(ID) FROM users GROUP BY Name, Phone, State HAVING repetitions > 1 ORDER BY ID DESC 

Answer 2

并不完美，但工作

SELECT COUNT(*) AS repetitions, Name, Phone, MAX(ID), categoryid, State 
FROM users 
GROUP BY Name, Phone, State 
HAVING repetitions > 1