如何获得内部选择最大（计数（*））的行

Question

我有一个查询，获取由三个字段分组的内部选择的最大数量。现在我不仅想要数字，而且要整行。我无法弄清楚。下面是返回数字查询：

SELECT MAX (count) FROM 
(SELECT COUNT (*) AS count, 
     field1, 
     field2, 
     field3 
    FROM someScheme.someTable 
    GROUP BY field1, field2, field3 
    ) AS counts 

Answer 1

使用order by和limit：

SELECT COUNT(*) AS count, field1, field2, field3 
FROM someScheme.someTable 
GROUP BY field1, field2, field3 
ORDER BY COUNT(*) DESC 
LIMIT 1; 

注：这仅返回最大的一个例子。

如果你想要所有可能的行，那么它是更为复杂：

SELECT COUNT(*) AS count, field1, field2, field3 
FROM someScheme.someTable 
GROUP BY field1, field2, field3 
HAVING COUNT(*) = (SELECT MAX(cnt) 
        FROM (SELECT COUNT(*) AS cnt 
         FROM someScheme.someTable 
         GROUP BY field1, field2, field3 
         ) t 
       );