In this blog we will covers some schema examples and their solutions which may help you to create database schema in advanced level.
Problem Scenario
The Indian Government wants to develop a Library Management System (LMS) to store information of the members, books, status of books issue, book availability and suppliers details
List of Tables:
Table #1: LMS_MEMBERS
Table #2: LMS_SUPPLIERS_DETAILS
Table #3: LMS_FINE_DETAILS
Table #4: LMS_BOOK_DETAILS
Table #5: LMS_BOOK_ISSUE
Database and Table Creations - DDL Queries:
<Refer to attachment “LMS_DDL.sql” in LMS_DDL_DML.zip” which is available in the Resources section>
Loading Data - DML Queries:
<Refer to attachment “LMS_DML.sql” in LMS_DDL_DML.zip” which is available in the Resources section>
Simple Questions:
Problem # 1:
Write a query to display the member id, member name, city and membership status who are all having life time membership. Hint: Life time membership status is “Permanent”.
Problem # 2:
Write a query to display the member id, member name who have not returned the books. Hint: Book return status is book_issue_status ='Y' or 'N'.
Problem # 3:
Write a query to display the member id, member name who have taken the book with book code 'BL000002'.
Problem # 4:
Write a query to display the book code, book title and author of the books whose author name begins with 'P'.
Problem # 5:
Write a query to display the total number of Java books available in library with alias name ‘NO_OF_BOOKS’.
Problem # 6:
Write a query to list the category and number of books in each category with alias name ‘NO_OF_BOOKS’.
Problem # 7:
Write a query to display the number of books published by "Prentice Hall” with the alias name “NO_OF_BOOKS”.
Problem # 8:
Write a query to display the book code, book title of the books which are issued on the date "1st April 2012".
Problem # 9:
Write a query to display the member id, member name, date of registration and expiry date of the members whose membership expiry date is before APR 2013.
Problem # 10:
write a query to display the member id, member name, date of registration, membership status of the members who registered before "March 2012" and membership status is "Temporary"
Problem #11:
Write a query to display the member id, member name who’s City is CHENNAI or DELHI. Hint: Display the member name in title case with alias name 'Name'.
Problem #12:
Write a query to concatenate book title, author and display in the following format.
Book_Title_is_written_by_Author
Example: Let Us C_is_written_by_Yashavant Kanetkar
Hint: display unique books. Use “BOOK_WRITTEN_BY” as alias name.
Problem #13:
Write a query to display the average price of books which is belonging to ‘JAVA’ category with alias name “AVERAGEPRICE”.
Problem #14:
Write a query to display the supplier id, supplier name and email of the suppliers who are all having gmail account.
Problem#15:
Write a query to display the supplier id, supplier name and contact details. Contact details can be either phone number or email or address with alias name “CONTACTDETAILS”. If phone number is null then display email, even if email also null then display the address of the supplier. Hint: Use Coalesce function.
Problem#16:
Write a query to display the supplier id, supplier name and contact. If phone number is null then display ‘No’ else display ‘Yes’ with alias name “PHONENUMAVAILABLE”. Hint: Use NVL2.
Average Questions:
Problem # 1:
Write a query to display the member id, member name of the members, book code and book title of the books taken by them.
Problem # 2:
Write a query to display the total number of books available in the library with alias name “NO_OF_BOOKS_AVAILABLE” (Which is not issued). Hint: The issued books details are available in the LMS_BOOK_ISSUE table.
Problem # 3:
Write a query to display the member id, member name, fine range and fine amount of the members whose fine amount is less than 100.
Problem # 4:
Write a query to display the book code, book title and availability status of the ‘JAVA’ books whose edition is "6”. Show the availability status with alias name “AVAILABILITYSTATUS”. Hint: Book availability status can be fetched from “BOOK_ISSUE_STATUS” column of LMS_BOOK_ISSUE table.
Problem # 5:
Write a query to display the book code, book title and rack number of the books which are placed in rack 'A1' and sort by book title in ascending order.
Problem # 6:
Write a query to display the member id, member name, due date and date returned of the members who has returned the books after the due date. Hint: Date_return is due date and Date_returned is actual book return date.
Problem # 7:
Write a query to display the member id, member name and date of registration who have not taken any book.
Problem # 8:
Write a Query to display the member id and member name of the members who has not paid any fine in the year 2012.
Problem # 9:
Write a query to display the date on which the maximum numbers of books were issued and the number of books issued with alias name “NOOFBOOKS”.
Problem # 10:
Write a query to list the book title and supplier id for the books authored by “Herbert Schildt" and the book edition is 5 and supplied by supplier ‘S01’.
Problem # 11:
Write a query to display the rack number and the number of books in each rack with alias name “NOOFBOOKS” and sort by rack number in ascending order.
Problem # 12:
Write a query to display book issue number, member name, date or registration, date of expiry, book title, category author, price, date of issue, date of return, actual returned date, issue status, fine amount.
Problem # 13:
Write a query to display the book code, title, publish date of the books which is been published in the month of December.
Problem # 14:
Write a query to display the book code, book title and availability status of the ‘JAVA’ books whose edition is "5”. Show the availability status with alias name “AVAILABILITYSTATUS”. Hint: Book availability status can be fetched from “BOOK_ISSUE_STATUS” column of LMS_BOOK_ISSUE table.
Complex Questions:
Problem # 1:
Write a query to display the book code, book title and supplier name of the supplier who has supplied maximum number of books. For example, if “ABC Store” supplied 3 books, “LM Store” has supplied 2 books and “XYZ Store” has supplied 1 book. So “ABC Store” has supplied maximum number of books, hence display the details as mentioned below.
Example:
BOOK_CODE BOOK_TITLE SUPPLIER_NAME
BL000008 Easy Reference for Java ABC STORE
BL000001 Easy Reference for C ABC STORE
BL000003 Easy Reference for VB ABC STORE
Problem # 2:
Write a query to display the member id, member name and number of remaining books he/she can take with “REMAININGBOOKS” as alias name. Hint: Assuming a member can take maximum 3 books. For example, Ramesh has already taken 2 books; he can take only one book now. Hence display the remaining books as 1 in below format.
Example:
MEMBER_ID MEMBER_NAME REMAININGBOOKS
LM001 RAMESH 1
LM002 MOHAN 3
Problem # 3
Write a query to display the supplier id and supplier name of the supplier who has supplied minimum number of books. For example, if “ABC Store” supplied 3 books, “LM Store” has supplied 2 books and “XYZ Store” has supplied 1 book. So “XYZ Store” has supplied minimum number of books, hence display the details as mentioned below.
Example:
SUPPLIER_ID SUPPLIER_NAME
S04 XYZ STORE
Creating Database and tables:
CREATE DATABASE lms_db;
USE lms_db;
Create table LMS_MEMBERS
(
MEMBER_ID Varchar(10),
MEMBER_NAME Varchar(30) NOT NULL,
CITY Varchar(20),
DATE_REGISTER Date NOT NULL,
DATE_EXPIRE Date ,
MEMBERSHIP_STATUS Varchar(15)NOT NULL,
Constraint LMS_cts1 PRIMARY KEY(MEMBER_ID)
);
Create table LMS_SUPPLIERS_DETAILS
(
SUPPLIER_ID Varchar(3),
SUPPLIER_NAME Varchar(30) NOT NULL,
ADDRESS Varchar(50),
CONTACT bigint(10) NOT NULL,
EMAIL Varchar(15) NOT NULL,
Constraint LMS_cts2 PRIMARY KEY(SUPPLIER_ID)
);
Create table LMS_FINE_DETAILS
(
FINE_RANGE Varchar(3),
FINE_AMOUNT decimal(10,2) NOT NULL,
Constraint LMS_cts3 PRIMARY KEY(FINE_RANGE)
);
Create table LMS_BOOK_DETAILS
(
BOOK_CODE Varchar(10),
BOOK_TITLE Varchar(50) NOT NULL,
CATEGORY Varchar(15) NOT NULL,
AUTHOR Varchar(30) NOT NULL,
PUBLICATION Varchar(30),
PUBLISH_DATE Date,
BOOK_EDITION int(2),
PRICE decimal(8,2) NOT NULL,
RACK_NUM Varchar(3),
DATE_ARRIVAL Date NOT NULL,
SUPPLIER_ID Varchar(3) NOT NULL,
Constraint LMS_cts4 PRIMARY KEY(BOOK_CODE),
Constraint LMS_cts41 FOREIGN KEY(SUPPLIER_ID) References LMS_SUPPLIERS_DETAILS(SUPPLIER_ID)
);
Create table LMS_BOOK_ISSUE
(
BOOK_ISSUE_NO int,
MEMBER_ID Varchar(10) NOT NULL,
BOOK_CODE Varchar(10) NOT NULL,
DATE_ISSUE Date NOT NULL,
DATE_RETURN Date NOT NULL,
DATE_RETURNED Date NULL,
FINE_RANGE Varchar(3),
Constraint LMS_cts5 PRIMARY KEY(BOOK_ISSUE_NO),
Constraint LMS_Mem FOREIGN KEY(MEMBER_ID) References LMS_MEMBERS(MEMBER_ID),
Constraint LMS_BookDetail FOREIGN KEY(BOOK_CODE) References LMS_BOOK_DETAILS(BOOK_CODE),
Constraint LMS_FineDetail FOREIGN KEY(FINE_RANGE) References LMS_FINE_DETAILS(FINE_RANGE)
);
Insert into LMS_MEMBERS
Values('LM001', 'AMIT', 'CHENNAI', '2012-02-12', '2013-02-11','Temporary');
Insert into LMS_MEMBERS
Values('LM002', 'ABDHUL', 'DELHI', '2012-04-10', '2013-04-09','Temporary');
Insert into LMS_MEMBERS
Values('LM003', 'GAYAN', 'CHENNAI', '2012-05-13','2013-05-12', 'Permanent');
Insert into LMS_MEMBERS
Values('LM004', 'RADHA', 'CHENNAI', '2012-04-22', '2013-04-21', 'Temporary');
Insert into LMS_MEMBERS
Values('LM005', 'GURU', 'BANGALORE', '2012-03-30', '2013-05-16','Temporary');
Insert into LMS_MEMBERS
Values('LM006', 'MOHAN', 'CHENNAI', '2012-04-12', '2013-05-16','Temporary');
select * from lms_members;
Insert into LMS_SUPPLIERS_DETAILS
Values ('S01','SINGAPORE SHOPPEE', 'CHENNAI', 9894123555,'sing@gmail.com');
Insert into LMS_SUPPLIERS_DETAILS
Values ('S02','JK Stores', 'MUMBAI', 9940123450 ,'jks@yahoo.com');
Insert into LMS_SUPPLIERS_DETAILS
Values ('S03','ROSE BOOK STORE', 'TRIVANDRUM', 9444411222,'rose@gmail.com');
Insert into LMS_SUPPLIERS_DETAILS
Values ('S04','KAVARI STORE', 'DELHI', 8630001452,'kavi@redif.com');
Insert into LMS_SUPPLIERS_DETAILS
Values ('S05','EINSTEN BOOK GALLARY', 'US', 9542000001,'eingal@aol.com');
Insert into LMS_SUPPLIERS_DETAILS
Values ('S06','AKBAR STORE', 'MUMBAI',7855623100 ,'akbakst@aol.com');
select * from LMS_SUPPLIERS_DETAILS;
Insert into LMS_FINE_DETAILS Values('R0', 0);
Insert into LMS_FINE_DETAILS Values('R1', 20);
insert into LMS_FINE_DETAILS Values('R2', 50);
Insert into LMS_FINE_DETAILS Values('R3', 75);
Insert into LMS_FINE_DETAILS Values('R4', 100);
Insert into LMS_FINE_DETAILS Values('R5', 150);
Insert into LMS_FINE_DETAILS Values('R6', 200);
select * from LMS_FINE_DETAILS;
Insert into LMS_BOOK_DETAILS
Values('BL000010', 'Java ForvDummies', 'JAVA', 'Paul J. Deitel', 'Prentice Hall', '1999-12-10', 6, 575.00, 'A1', '2011-05-10', 'S01');
Insert into LMS_BOOK_DETAILS
Values('BL000002', 'Java: The Complete Reference ', 'JAVA', 'Herbert Schildt', 'Tata Mcgraw Hill ', '2011-10-10', 5, 750.00, 'A1', '2011-05-10', 'S03');
Insert into LMS_BOOK_DETAILS
Values('BL000003', 'Java How To Do Program', 'JAVA', 'Paul J. Deitel', 'Prentice Hall', '1999-05-10', 6, 600.00, 'A1', '2012-05-10', 'S01');
Insert into LMS_BOOK_DETAILS
Values('BL000004', 'Java: The Complete Reference ', 'JAVA', 'Herbert Schildt', 'Tata Mcgraw Hill ', '2011-10-10', 5, 750.00, 'A1', '2012-05-11', 'S01');
Insert into LMS_BOOK_DETAILS
Values('BL000005', 'Java How To Do Program', 'JAVA', 'Paul J. Deitel', 'Prentice Hall', '1999-12-10', 6, 600.00, 'A1', '2012-05-11', 'S01');
Insert into LMS_BOOK_DETAILS
Values('BL000006', 'Java: The Complete Reference ', 'JAVA', 'Herbert Schildt', 'Tata Mcgraw Hill ', '2011-10-10', 5, 750.00, 'A1', '2012-05-12', 'S03');
Insert into LMS_BOOK_DETAILS
Values('BL000007', 'Let Us C', 'C', 'Yashavant Kanetkar ', 'BPB Publications', '2010-12-11', 9, 500.00 , 'A3', '2010-11-03', 'S03');
Insert into LMS_BOOK_DETAILS
Values('BL000008', 'Let Us C', 'C', 'Yashavant Kanetkar ','BPB Publications', '2010-05-12', 9, 500.00 , 'A3', '2011-08-09', 'S04');
Insert into LMS_BOOK_DETAILS
Values('BL000009', 'Let Us C#', 'C', 'Yashavant Kanetkar ','BPB Publications', '2010-05-12', 9, 550.00 , 'A3', '2011-08-09', 'S04');
Insert into LMS_BOOK_DETAILS
Values('BL000011', 'Let Us C++', 'C', 'Yashavant Kanetkar ','BPB Publications', '2010-05-12', 9, 650.00 , 'A3', '2011-08-09', 'S04');
select * from LMS_BOOK_DETAILS;
Insert into LMS_BOOK_ISSUE
Values (001, 'LM001', 'BL000010', '2012-05-01', '2012-05-16', '2012-05-16', 'R0');
Insert into LMS_BOOK_ISSUE
Values (002, 'LM002', 'BL000002', '2012-05-01', '2012-05-06','2012-05-16', 'R2');
Insert into LMS_BOOK_ISSUE
Values (003, 'LM003', 'BL000007', '2012-04-01', '2012-04-16', '2012-04-20','R1');
Insert into LMS_BOOK_ISSUE
Values (004, 'LM004', 'BL000005', '2012-04-01', '2012-04-16','2012-04-20', 'R1');
Insert into LMS_BOOK_ISSUE
Values (005, 'LM005', 'BL000008', '2012-03-30', '2012-04-15','2012-04-20' , 'R1');
Insert into LMS_BOOK_ISSUE
Values (006, 'LM005', 'BL000008', '2012-04-20', '2012-05-05','2012-05-05' , 'R0');
Insert into LMS_BOOK_ISSUE
Values (007, 'LM003', 'BL000007', '2012-04-22', '2012-05-07','2012-05-25' , 'R4');
select * from LMS_BOOK_ISSUE ;
Solutions
\\1\\
select member_id,member_name,city,membership_status
from lms_members
where membership_status='permanent';
select*from lms_book_issue;
\\2\\
select bd.book_code,bd.publication,bd.price,sd.SUPPLIER_NAME,
count(bi.book_code)
From lms_book_details bd
join lms_suppliers_details sd
join lms_book_issue bi
on sd.SUPPLIER_ID= bd.SUPPLIER_ID
and bd.BOOK_CODE=bi.BOOK_CODE
group by bd.BOOK_CODE
Having count(bi.book_code)=(select count(Book_code)
from lms_book_issue
group by book_code
order by count(Book_code)desc
limit 1);
\\3\\
select member_id,member_name
from lms_members
where member_id in
(select member_id
from lms_book_issue
where book_code like'%02');
\\4\\
select book_code,author,book_title
from lms_book_details
where author like 'p%';
\\5\\
select count(category) no_of_books
from lms_book_details
where category ='java';
\\6\\
select category,count(category) no_of_book
from lms_book_details
where category ='java' or category='C'
group by category;
\7\
select count(author) no_of_books
from lms_book_details
where publication like 'p%';
\\8\\
select book_title,book_code
from lms_book_details
where book_code in
(select book_code
from lms_book_issue
where date_issue ='2012-04-01');
\\9\\
select member_id,member_name,date_register,date_expire
from lms_members
where date_expire<'2013-04-00';
\\10\\
select member_name,member_id,date_register,membership_status
from lms_members
where membership_status='temporary' and date_register<'2012-03-00';
\\11\\
select member_id,member_name name,city
from lms_members
where city='delhi' or city='chennai';
\\12\\
select concat(book_title,'_Is_Written_by_',author)
from lms_book_details;
\\13\\
select avg(price) as averageprice from lms_book_details
where category='java'
\\14\\
select supplier_id,supplier_name,email
from lms_suppliers_details
where email like '%gmail%';
\\15\\
SELECT supplier_Name,supplier_id,
COALESCE(contact,email,address) contactaddress
FROM lms_suppliers_details;
select supplier_name,supplier_id,contact,
if (contact is null,'no','yes')
from lms_suppliers_details;
\\17\\
SELECT m.MEMBER_ID, m.MEMBER_NAME, m.CITY,m.membership_status,
SUM(f.FINE_AMOUNT) AS Fine
FROM LMS_MEMBERS m JOIN
LMS_BOOK_ISSUE i ON m.MEMBER_ID = i.MEMBER_ID
JOIN
LMS_FINE_DETAILS f ON i.FINE_RANGE = f.FINE_RANGE
GROUP BY m.MEMBER_ID, m.MEMBER_NAME, m.CITY,m.membership_status
\\avg problems\\
\\1\\
select member_id,member_name,book_title,book_code
from lms_members
join
lms_fine_details;
\\2\\
select count(book_code)no_books_available
from lms_book_details
where book_code not in (select book_code from lms_book_issue);
\\3\\
select m.member_id,m.member_name,f.fine_range,sum(f.fine_amount)
from lms_members m
join
lms_fine_details f
join
lms_book_issue bi
on m.member_id=bi.member_id and
f.fine_range=bi.fine_range
group by m.member_id
having sum(f.fine_amount)>100;
\\4\\
select book_code,book_title,
publication,price,book_edition,publish_date
from lms_book_details
order by book_edition,publication,publish_date ;
\\5\\
select book_code,book_title,rack_num
from lms_book_details
where rack_num='A1'
ORDER BY BOOK_title;
\\6\\
select m.member_id,m.member_name,bi.date_return,bi.date_returned
from lms_members m
join
lms_book_issue bi
on m.member_id=bi.member_id
where date_return != date_returned;
\\7\\
select m.member_id,m.member_name,m.date_register
from lms_members m
where member_id not in(select member_id from lms_book_issue);
\\8\\
select member_id,member_name
from
lms_members
where
member_id not in(select bi.member_id
from lms_book_issue bi
join lms_fine_details f
on f.fine_range=bi.fine_range
where year(date_returned)=2012
group by bi.member_id
having sum(f.fine_amount)>0);
\\9\\
select count(date_issue)no_of_books,date_issue from lms_book_issue
group by book_code
having count(date_issue)=
(select count(date_issue)
from lms_book_issue
group by date_issue
order by count(date_issue)desc
limit 1);
\\10\\
select book_title,supplier_id
from lms_book_details
where author like 'h%'
and supplier_id='S01'
and book_edition=5;
\\11\\
select count(rack_num)no_of_books,rack_num
from lms_book_details
group by rack_num
order by count(rack_num);
\\12\\
select member_name,book_title,category,author,price,
date_issue,date_return,date_returned,book_issue_no
fine_amount
from lms_book_details
join lms_members
join lms_suppliers_details
join lms_book_issue
join lms_fine_details;
\\13\\
select book_code,book_title,publish_date
from lms_book_details
where month(publish_date)=12;
\\14\\
select book_code,book_title,bd.supplier_id,max(price)
,supplier_name
from lms_book_details bd
join lms_suppliers_details sd
on sd.supplier_id=bd.supplier_id
group by supplier_id;
\\15\\
select book_code,book_title,
publication,datediff(current_date,publish_date)no_of_days
from lms_book_details
order by datediff(current_date,publish_date) ;
select * from LMS_BOOK_ISSUE ;
select * from lms_members;
select * from LMS_BOOK_DETAILS;
select * from LMS_FINE_DETAILS;
select * from LMS_SUPPLIERS_DETAILS;
Complex
\\2\\
select m.member_id,member_name,3-count( date_issue)remaining
from lms_members m
left join lms_book_issue bi
on m.member_id=bi.member_id
group by member_id;
\\3\\
select sd.supplier_id,sd.supplier_name,count(rack_num)
from lms_suppliers_details sd
join lms_book_details bd
on sd.supplier_id=bd.supplier_id
group by sd.supplier_id
having count(rack_num)=(select count(rack_num)
from lms_book_details bd join lms_suppliers_details sd
on sd.supplier_id=bd.supplier_id
group by sd.supplier_id
order by count(rack_num)
limit 1);