立即学习:https://edu.csdn.net/course/play/9885/210089?utm_source=blogtoedu
group后面加条件不用where,用的是having;
加--是注释掉语句;
降序排序:ORDER BY SUM(salary) DESC
立即学习:https://edu.csdn.net/course/play/9885/210089?utm_source=blogtoedu
group后面加条件不用where,用的是having;
加--是注释掉语句;
降序排序:ORDER BY SUM(salary) DESC