sqlquery5.sql

经典的SOL面试题,涵盖了数据库各个层面的问题和答案。

/*
create table student (name varchar(10),curricula varchar(10),mark int)
insert into student select 'xuu','math',100
insert into student select 'xuu','phy',100
insert into student select 'xuu','science',100
insert into student select 'xuu','chinese',100
insert into student select 'xuu','english',100

insert into student select 'wang','math',110
insert into student select 'wang','phy',110
insert into student select 'wang','science',110
insert into student select 'wang','chinese',110
insert into student select 'wang','english',110
*/
/*
Student表有三列,分别是姓名、课程、成绩 
Name Curricula Mark 
张三 语文 70 
李四 数学 80 
王朝 英语 59 
城南 马哲 70 
王朝 语文 90 
. . . 
. . . 

查询每门学科成绩及格(Mark > 60)的学生的名字？ 

查询出总分排名前三的学员名字?
*/
/*
select name from student group by name having min(mark)>60

select top 3 name, sum(mark) from student 
group by name 
order by sum(mark)

*/