sql - 获取来自同一城市的3名或3名以上员工的员工列表？

我正在使用以下查询来查找拥有3名以上员工的城市名称

SELECT M.NAME
FROM MasterCity M
INNER JOIN Employee E ON E.CityID = M.ID
GROUP BY E.CityID
HAVING count(E.CityID) >= 3;

它给我以下错误

Column 'MasterCity.Name' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.

怎么了。？提前致谢

最佳答案

变体＃1-

SELECT MAX(M.Name) AS Name
FROM MasterCity M
JOIN Employee E ON E.CityID = M.ID
GROUP BY E.CityID
HAVING COUNT(E.CityID) >= 3;

变体＃2-

SELECT M.Name
FROM MasterCity M
JOIN Employee E ON E.CityID = M.ID
GROUP BY E.CityID, M.Name
HAVING COUNT(E.CityID) >= 3;