标签：学生 数值 column code group by div tab ble sla
SUM() 函数返回数值列的总数。
SELECT SUM(column_name) FROM table_name;
例句：
查询所有学生所有科目的总分数
select sum(score) from SC
查询每个学生的总分数
select S,sum(score) sum from sc group by S having S
标签：学生 数值 column code group by div tab ble sla
原文地址：https://www.cnblogs.com/jiablogs/p/8806764.html
