山东大学软件学院数据库系统实验一：建表、删除表、插入数据

1-1：

create 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))

1-2：

create table test1_course(cid char(6) not null,name varchar(40) not null,fcid char(6),credit numeric(4,1))

1-3：

create table test1_student_course (sid char(12) not null ,cid char(6) not null,score numeric(5,1),tid char(6),sctime date)

1-4：

先删除之前重复插入错误的数据

①delete from test1_student where age = 20

然后完成sql查询

②insert into test1_student values (201800020101,'王欣','女',21,to_date('19940202','yyyymmdd'),'计算机学院','2010')

③insert into test1_student values (201800020102,'李华','女',20,to_date('19950303','yyyymmdd'),'软件学院','2009')

1-5：

在之前的基础上修改错误

①delete from test1_course where CID = 800002 and CREDIT=2

②insert into test1_course values(800002,'数据库',800001,2.5)

1-6：

在之前的基础上修改错误

①delete from test1_student_course where TID = 200101

②insert into test1_student_course values (201800020101,300001,91.5,200101,to_date('2009-07-15 9-9-9','yyyy-mm-dd hh24-mi-ss'))

③insert into test1_student_course values (201800020101,300002,92.6,200102,to_date('2009-07-15 10-10-10','yyyy-mm-dd hh24-mi-ss'))