 
/*
Q1. Consider the following schema for a Library Database:
●BOOK (Book_id, Title, Publisher_Name, Pub_Year) 
●BOOK_AUTHORS (Book_id, Author_Name) 
●PUBLISHER (Name, Address, Phone) 
●BOOK_COPIES (Book_id, Branch_id, No-of_Copies) 
●BOOK_LENDING (Book_id, Branch_id, Card_No, Date_Out, Due_Date) LIBRARY_BRANCH (Branch_id, Branch_Name, Address)
 Write SQL queries to: 
1. Retrieve details of all books in the library – id, title, name of publisher, authors, number of copies in each branch, etc. 
2. Get the particulars of borrowers who have borrowed more than 3 books, but from Jan 2017 to Jun 2017 
3. Delete a book in BOOK table. Update the contents of other tables to reflect this data manipulation operation. 
4. Partition the BOOK table based on year of publication. Demonstrate its working with a simple query. 
5. Create a view of all books and its number of copies that are currently available in the Library.
# Consider the following schema for a Library Database:
# BOOK (Book_id, Title, Publisher_Name, Pub_Year)
# BOOK_AUTHORS (Book_id, Author_Name)
# PUBLISHER (Name, Address, Phone)
# BOOK_COPIES (Book_id, Branch_id, No-of_Copies)
# BOOK_LENDING (Book_id, Branch_id, Card_No, Date_Out, Due_Date)
# LIBRARY_BRANCH (Branch_id, Branch_Name, Address)*/



create table publisher(
    name varchar(20) primary key,
    address varchar(20),
    phone varchar(10)
);

create table book(
    book_id int primary key,
    title varchar(10),
    publisher_name varchar(20),
    pub_year year,
    foreign key (publisher_name) references publisher(name) on delete cascade
);

create table book_authors(
    book_id int primary key,
    author_name varchar(10),
    foreign key (book_id) references book(book_id) on delete cascade
);

create table library_branch(
    branch_id int primary key,
    branch_name varchar(20),
    address varchar(20)
);

create table book_copies(
    book_id int,
    branch_id int,
    no_of_copies int,
    foreign key (book_id) references book(book_id) on delete cascade ,
    foreign key (branch_id) references library_branch(branch_id) on delete cascade
);

create table book_lending(
    book_id int,
    branch_id int,
    card_no int,
    date_out date,
    due_date date,
    foreign key (book_id) references book(book_id) on delete cascade ,
    foreign key (branch_id) references library_branch(branch_id) on delete cascade
);

# Value Insertion

insert into publisher
    (name, address, phone)
values
    ('A', 'BENGALURU', '9879879879'),
    ('B', 'BENGALURU', '8798798791'),
    ('C', 'MYSURU',   '7897897892');

select * from publisher;

insert into book
    (book_id, title, publisher_name, pub_year)
values
    (1, 'DSA', 'A', 1998),
    (2, 'ADA', 'A', 2000),
    (3, 'DBMS', 'B', 2005),
    (4, 'SE', 'C', 2005);

select * from book;

insert into book_authors
    (book_id, author_name)
values
    (1, 'AB'),
    (2, 'CD'),
    (3, 'EF'),
    (4, 'GH');

select * from book_authors;

insert into library_branch
    (branch_id, branch_name, address)
values
    (11, 'LIB1', 'MYSURU'),
    (22, 'LIB2', 'MYSURU'),
    (33, 'LIB3', 'BENGALURU'),
    (44, 'LIB4', 'MANGALURU');

select * from library_branch;

insert into book_copies
    (book_id, branch_id, no_of_copies)
values
    (1, 11, 10),
    (1, 22, 20),
    (2, 22, 30),
    (3, 33, 40),
    (4, 44, 25),
    (4, 33, 15);

select * from book_copies;

insert into book_lending
    (book_id, branch_id, card_no, date_out, due_date)
values
    (1, 11, 1010, '2020-01-02', '2020-02-01'),
    (2, 22, 1010, '2020-03-01', '2020-04-01'),
    (3, 33, 1010, '2021-02-02', '2021-03-02'),
    (4, 44, 1010, '2022-01-02', '2022-02-01'),
    (1, 22, 1012, '2020-01-02', '2020-02-01');

select * from book_lending;
select b.book_id,b.title,b.publisher_name,ba.author_name,bc.no_of_copies
from book b
natural join book_authors ba
natural join book_copies bc;
select card_no from book_lending
where date_out between '2020-02-01' and '2022-02-01'
group by card_no having count(*)>3;

created 1 year ago

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About MySQL

MySQL is a open-source, free and very popular relational database management system which is developed, distributed and supported by Oracle corporation.

Key Features:

Open-source relational database management systems.
Reliable, very fast and easy to use database server.
Works on client-server model.
Highly Secure and Scalable
High Performance
High productivity as it uses stored procedures, triggers, views to write a highly productive code.
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Syntax help

Commands

1. CREATE

CREATE TABLE table_name (
                column1 datatype,
                column2 datatype,
                ....);

Example

CREATE TABLE EMPLOYEE (
  empId INTEGER PRIMARY KEY,
  name TEXT NOT NULL,
  dept TEXT NOT NULL
);

2. ALTER

ALTER TABLE Table_name ADD column_name datatype;

Example

INSERT INTO EMPLOYEE VALUES (0001, 'Dave', 'Sales');

3. TRUNCATE

TRUNCATE table table_name;

4. DROP

DROP TABLE table_name;

5. RENAME

RENAME TABLE table_name1 to new_table_name1;

6. COMMENT

Single-Line Comments:

 --Line1;

Multi-Line comments:

   /* Line1,
   Line2 */

DML Commands

1. INSERT

INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...);

Note: Column names are optional.

Example

INSERT INTO EMPLOYEE VALUES (0001, 'Ava', 'Sales');

2. SELECT

SELECT column1, column2, ...
FROM table_name
[where condition];

Example

SELECT * FROM EMPLOYEE where dept ='sales';

3. UPDATE

UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;

Example

UPDATE EMPLOYEE SET dept = 'Sales' WHERE empId='0001';

4. DELETE

DELETE FROM table_name where condition;

Example

DELETE from EMPLOYEE where empId='0001';

Indexes

1. CREATE INDEX

  CREATE INDEX index_name on table_name(column_name);

To Create Unique index:

  CREATE UNIQUE INDEX index_name on table_name(column_name);

2. DROP INDEX

DROP INDEX index_name ON table_name;

Views

1. Create a View

Creating a View:
CREATE VIEW View_name AS 
Query;

2. How to call view

SELECT * FROM View_name;

3. Altering a View

ALTER View View_name AS 
Query;

4. Deleting a View

DROP VIEW View_name;

Triggers

1. Create a Trigger

CREATE TRIGGER trigger_name trigger_time trigger_event
    ON tbl_name FOR EACH ROW [trigger_order] trigger_body
/* where
trigger_time: { BEFORE | AFTER }
trigger_event: { INSERT | UPDATE | DELETE }
trigger_order: { FOLLOWS | PRECEDES } */

2. Drop a Trigger

DROP TRIGGER [IF EXISTS] trigger_name;

Stored Procedures

1. Create a Stored Procedure

CREATE PROCEDURE sp_name(p1 datatype)
BEGIN
/*Stored procedure code*/
END;

2. How to call Stored procedure

CALL sp_name;

3. How to delete stored procedure

DROP PROCEDURE sp_name;

Joins

1. INNER JOIN

SELECT * FROM TABLE1 INNER JOIN TABLE2 where condition;

2. LEFT JOIN

SELECT * FROM TABLE1 LEFT JOIN TABLE2 ON condition;

3. RIGHT JOIN

SELECT * FROM TABLE1 RIGHT JOIN TABLE2 ON condition;

4. CROSS JOIN

SELECT select_list from TABLE1 CROSS JOIN TABLE2;