Can not CREATE TABLE? - mysql

Question

I am working library project. I want to create a database and table, but I do not know why my codes do not work. I check all create table syntax no errors.
Could you teach me how to fix them?
DROP DATABASE IF EXISTS LIBRARYS;
CREATE DATABASE LIBRARYS;
USE LIBRARYS;
DROP TABLE IF EXISTS BOOK;
CREATE TABLE BOOK
(
title VARCHAR(50) NOT NULL,
author VARCHAR(30),
BookId INT auto_increment,
ISBN INT,
Edition VARCHAR(50),
YearBought INT,
Category VARCHAR (30),
LibraryBranchID INT auto_increment,
PRIMARY KEY(BookId),
FOREIGN KEY ( LibraryBranchID) references LibraryBranch(BranchName)
);
DROP TABLE IF EXISTS Person;
CREATE TABLE Person
(PersonId INT AUTO_INCREMENT,
uNAME VARCHAR(30) NOT NULL,
age INT,
UserType VARCHAR (30),
PreferredBranch INT,
updatedOn timestamp not null on update current_timestamp,
PRIMARY KEY (PersonId),
FOREIGN KEY ( PreferredBranch) references LibraryBranch(LibraryBranchID)
) ;
ALTER table Person AUTO_INCREMENT = 1001;
DROP TABLE IF EXISTS LOAN;
CREATE TABLE LOAN
(LoanId INT auto_increment,
Pid INT,
Bid INT,
loanDate DATE DEFAULT '0000-00-00',
overdue BOOLEAN DEFAULT FALSE,
PRIMARY KEY(LoanId),
FOREIGN KEY (Pid) references Person (PersonId),
FOREIGN KEY (Bid) references Book(BookId)
) ;
DROP TABLE IF EXISTS LibraryBranch ;
CREATE TABLE LibraryBranch
(uID INT AUTO_INCREMENT,
LibraryBranchID INT auto_increment,
BranchName INT,
updatedOn timestamp not null on update current_timestamp,
PRIMARY KEY (LibraryBranchID)
) ;
DROP TABLE IF EXISTS Rating;
CREATE TABLE Rating
(RatingId INT ,
RatingDate INT,
BookId INT,
PersonId INT,
Stars BOOLEAN DEFAULT FALSE,
PRIMARY KEY(RatingId),
FOREIGN KEY (PersonId) references Person (PersonId),
FOREIGN KEY (BookId) references BOOK(BookId)
) ;
LOAD DATA LOCAL INFILE '' INTO TABLE BOOK;
LOAD DATA LOCAL INFILE '' INTO TABLE Person;
LOAD DATA LOCAL INFILE '' INTO TABLE LOAN;
Here I got those results
1 row(s) affected
0 row(s) affected
0 row(s) affected, 1 warning(s): 1051 Unknown table 'librarys.book'
Error Code: 1075. Incorrect table definition; there can be only one auto column and it must be defined as a key

Answer 1

CREATE TABLE LibraryBranch should be before your call FOREIGN KEY ( LibraryBranchID) references LibraryBranch(BranchName)
CREATE TABLE BOOK
(
...
BookId INT auto_increment,
...
LibraryBranchID INT auto_increment,
...
PRIMARY KEY(BookId),
FOREIGN KEY ( LibraryBranchID) references LibraryBranch(BranchName)
);
and if FOREIGN KEY ( LibraryBranchID) references LibraryBranch(BranchName) this LibraryBranchID can't be auto_increment
FOREIGN KEY ( LibraryBranchID) references LibraryBranch(BranchName) wrong field BranchName called should be LibraryBranchID:
FOREIGN KEY ( LibraryBranchID) references LibraryBranch(LibraryBranchID)
and there is no need to DROP TABLE IF EXISTS each table since you just created the database
UPDATE http://sqlfiddle.com/#!9/86bb96
CREATE TABLE LibraryBranch
(uID INT,
LibraryBranchID INT auto_increment,
BranchName INT,
updatedOn timestamp not null on update current_timestamp,
PRIMARY KEY (LibraryBranchID)
) ;
CREATE TABLE BOOK
(
title VARCHAR(50) NOT NULL,
author VARCHAR(30),
BookId INT auto_increment,
ISBN INT,
Edition VARCHAR(50),
YearBought INT,
Category VARCHAR (30),
LibraryBranchID INT ,
PRIMARY KEY(BookId),
FOREIGN KEY ( LibraryBranchID) references LibraryBranch(LibraryBranchID)
);
CREATE TABLE Person
(PersonId INT AUTO_INCREMENT,
uNAME VARCHAR(30) NOT NULL,
age INT,
UserType VARCHAR (30),
PreferredBranch INT,
updatedOn timestamp not null on update current_timestamp,
PRIMARY KEY (PersonId),
FOREIGN KEY ( PreferredBranch) references LibraryBranch(LibraryBranchID)
) ;
ALTER table Person AUTO_INCREMENT = 1001;
CREATE TABLE LOAN
(LoanId INT auto_increment,
Pid INT,
Bid INT,
loanDate DATE DEFAULT '0000-00-00',
overdue BOOLEAN DEFAULT FALSE,
PRIMARY KEY(LoanId),
FOREIGN KEY (Pid) references Person (PersonId),
FOREIGN KEY (Bid) references Book(BookId)
) ;
CREATE TABLE Rating
(RatingId INT ,
RatingDate INT,
BookId INT,
PersonId INT,
Stars BOOLEAN DEFAULT FALSE,
PRIMARY KEY(RatingId),
FOREIGN KEY (PersonId) references Person (PersonId),
FOREIGN KEY (BookId) references BOOK(BookId)
) ;

Answer 2

In this code:
CREATE TABLE LibraryBranch
(uID INT AUTO_INCREMENT,
LibraryBranchID INT auto_increment,
BranchName INT,
updatedOn timestamp not null on update current_timestamp,
PRIMARY KEY (LibraryBranchID)
) ;
You made uID an auto column, but LibraryBranchID is the PK.

Answer 3

You cannot have two auto_increment fields in mysql innodb tables.
You can use trigger for second field if you want it to auto increment.