山东大学数据库实验1（2021年最新版）

Posted 2021-05-18 weixin_47373497

山东大学数据库实验1（2021年最新版）

creat table test1_student
        (  sid         char(12)  not null,
           name     varchar(10) not null,
           sex        char(2),
           age       int,
           birthday   date,
           dname     varchar(30),
           class        varchar(10) )
create table test1_course
        (  cid  char(6) not null,
           name varchar(40)  not null,
           fcid    char(6),
           credit  numeric(4,1))
create table test1_student_course
        (  sid  char(20) not null,
           cid   char(6)  not null,
           score  numeric(5,1),
           tid  char(6),
           sctime date )
insert into test1_student values(‘200800020101’,’王欣’,’女’,19,date’1994-02-02’,’计算机学院’,’2010’);
insert into test1_student values(‘200800020102’,’李华’,’女’,20,date’1995-03-03’,’软件学院’,’2009’);
insert into test1_course values(300001,'数据结构',null,2);

insert into test1_course values(300002,'数据库',300001,2.5);

Insert into test1_student_course values(200800020101,300001,91.5,100101);

Insert into test1_student_course values(200800020101,300002,92.6,100102);

create table a as 
select distinct sid 
from test1_student_course;
create table b as
Select distinct sid
from test1_student
minus
select sid
from a;
create view test2_01 as
select test1_student.sid,name
from test1_student cross join b
where (test1_student.sid = b.sid);

create view test2_01 as
select test1_student.sid,name
from test1_student CROSS JOIN b
where (test1_student.sid = b.sid);