Archie is developing a library management system to manage books, authors, and borrowers. The system needs to handle three main types of data: BOOKS, AUTHORS, and BORROWERS.Write the DDL statements to create the following tables with the mentioned constraints to handle the data: symbol refers to the primary key NN refers to Not NULL After creating the tables, Archie needs to:Alter the BOOKS table to change the primary key to Title to ensure each book is uniquely identified by its title.Drop the primary key from the BORROWERS table as it is no longer requiredAlter the AUTHORS table to change the Nationality to NULL Note: The user must write only the query to create and alter the table. The query to display the description of the table is already given.Input format :No console inputOutput format :The output displays the successful table creation status and the structure of all three tables

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Solution

To create the tables, you can use the CREATE TABLE statement in SQL. Here's how you can create the BOOKS, AUTHORS, and BORROWERS tables:

CREATE TABLE BOOKS (
    BookID INT PRIMARY KEY,
    Title VARCHAR(255) NOT NULL,
    AuthorID INT NOT NULL,
    BorrowerID INT NOT NULL
);

CREATE TABLE AUTHORS (
    AuthorID INT PRIMARY KEY,
    Name VARCHAR(255) NOT NULL,
    Nationality VARCHAR(255) NOT NULL
);

CREATE TABLE BORROWERS (
    BorrowerID INT PRIMARY KEY,
    Name VARCHAR(255) NOT NULL,
    Address VARCHAR(255) NOT NULL
);

To alter the BOOKS table to change the primary key to Title, you first need to drop the existing primary key and then add a new one:

ALTER TABLE BOOKS
DROP PRIMARY KEY,
ADD PRIMARY KEY (Title);

To drop the primary key from the BORROWERS table, you can use the ALTER TABLE statement with the DROP PRIMARY KEY clause:

ALTER TABLE BORROWERS
DROP PRIMARY KEY;

To alter the AUTHORS table to change the Nationality to NULL, you can use the ALTER TABLE statement with the MODIFY clause:

ALTER TABLE AUTHORS
MODIFY Nationality VARCHAR(255);

This will change the Nationality column to allow NULL values.

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Similar Questions

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Alter the BOOKS table to change the primary key to Title to ensure each book is uniquely identified by its title.Drop the primary key from the BORROWERS table as it is no longer requiredAlter the AUTHORS table to change the Nationality to NULL

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