怎么用sql 语句3. count所有学生的分数的总分,平均分,最高分和最低分

这个要根据表格结构来写sql语句的 具体情况具体分析 不能一概而论常见语句更新：update table1 set field1=value1 where 范围查找：select * from table1 where field1 like ’%value1%’ （所有包含‘value1’这个模式的字符串）排序：select * from table1 order by field1,field2 [desc]求和：select sum(field1) as sumvalue from table1平均：select avg(field1) as avgvalue from table1最大：select max(field1) as maxvalue from table1最小：select min(field1) as minvalue from table1[separator]