1.sql數據處理問題
阿新 • • 發佈：2018-05-21
分組1.查詢出每門課都大於 80 分的學生姓名
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('張三','語文',81 );
insert into test2(name,kecheng,fenshu) values('張三','數學',75 );
insert into test2(name,kecheng,fenshu) values('李四','語文',76 );
insert into test2(name,kecheng,fenshu) values('李四','數學',90 );
insert into test2(name,kecheng,fenshu) values('王五','語文',81 );
insert into test2(name,kecheng,fenshu) values('王五','數學',100);
insert into test2(name,kecheng,fenshu) values('王五','英語',90 );
-- (1)
select name
from test2 group by name
having min(fenshu) > 80;
王五
-- (2)
select distinct name from test2 where name not in (select distinct name from test2 where fenshu<=80)
王五1.sql數據處理問題