无效使用群组HAVING

Question

我正在尝试编写一个查询来选择选择的最高值。

SELECT especialidad,COUNT(*)
    FROM medicos    
        GROUP BY especialidad
        HAVING COUNT(*)=(SELECT MAX(COUNT(*))
            FROM medicos
                ORDER BY nombre,especialidad);

Answer 1

由于order by导致第二个max(count(*))无关，因此您只需执行<{p}}

SELECT especialidad, COUNT(*)
FROM medicos    
GROUP BY especialidad
ORDER BY COUNT(*) DESC
LIMIT 1

Answer 2

您可以使用order by desc and limit 1

SELECT especialidad,COUNT(*) as total
FROM medicos    
GROUP BY especialidad
order by total desc limit 1