Salary offers are made based on the candidate's qualifications, experience, skills, and education as they directly relate to the requirements of the position, as well as internal and market factors and grade profile. Affirmative Action Statement ...
SELECT grade FROM student GROUP BY grade grade A B C D 多个字段分组 SELECT name,SUM(salary) FROM student GROUP BY name,grade 按照名字和成绩划分,查看相同名字下的工资总和sum()是聚合函数 PS: 这里把名字和成绩看成一个整体,只要是name相同,grade不同,就是两条记录 Group By中Select指定的字段限制 s...