我无法正确回答以下问题
Show the years in which three prizes were given for Physics.
我编写了以下脚本,但它返回错误。
SELECT yr, COUNT(subject) FROM nobel
WHERE subject = 'Physics'
GROUP BY yr
HAVING COUNT(subject) = 3
感谢您的宝贵时间
最佳答案
该查询看起来正确,但如果没有指向 SqlZoo 页面的链接,我无法确定。
尝试
SELECT yr FROM nobel
WHERE subject = 'Physics'
GROUP BY yr
HAVING COUNT(subject) = 3
——您返回的结果的确切格式可能很挑剔。它只要求年份。
关于mysql - SQLzoo 教程 | GROUP BY 和 HAVING,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18218315/