Ceibahuang

摘要： 表(student)结构如下：name scorehuang 90huang 100huang 200wang 90wang 70a.取出所有人记录并显示它们的行号：select row_number() OVER (ORDER BY name ASC) asrowno,* from studentb.取出每个人的排名第二的成绩：select * from(select name,score,(r... 阅读全文