1.sql数据处理问题

1.查询出每门课都大于 80 分的学生姓名

create table test2(id int not null auto_increment,name    varchar(10),kecheng varchar(10),fenshu  int,primary key(id))insert into test2(name,kecheng,fenshu) values('张三','语文',81 );insert into test2(name,kecheng,fenshu) values('张三','数学',75 );insert into test2(name,kecheng,fenshu) values('李四','语文',76 );insert into test2(name,kecheng,fenshu) values('李四','数学',90 );insert into test2(name,kecheng,fenshu) values('王五','语文',81 );insert into test2(name,kecheng,fenshu) values('王五','数学',100);insert into test2(name,kecheng,fenshu) values('王五','英语',90 );-- (1)select namefrom test2 group by namehaving min(fenshu) > 80;王五-- (2)select distinct name from test2 where name not in (select distinct name from test2 where fenshu<=80)王五