📄 mytables.ddl
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delete from t_student;
delete from t_teacher;
delete from t_book;
delete from t_studentteacherjoin;
delete from t_family;
drop table t_student;
drop table t_family;
drop table t_book;
drop table t_teacher;
drop table t_StudentTeacherJoin;
create table t_student(
sID integer primary key,
name varchar(255),
grade integer,
familyNO integer
);
create table t_family(
fID integer primary key,
address varchar(255)
);
create table t_book(
publisher varchar(255),//isbn
bookCode integer, //copyNumber
title varchar(255),
author varchar(255),
studentNo integer,
primary key (publisher, bookCode)
);
create table t_teacher(
tID integer primary key,
name varchar(255)
);
create table t_StudentTeacherJoin(
teacher_ID integer,
student_ID integer
);
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