Dbms university library database
3 likes441 views
This document describes the structure of a University Database with tables for Books, Authors, Types, Students, and Borrows. It includes the attributes for each table and defines them with data types. It lists commands to create the tables, insert data, and queries to retrieve specific data, such as books with a page count over 100, all male students from a certain class, the number of male and female students in each class, and the book with the highest page count.
Dbms university library database
- 1. B.Tech III Sem ‘A’ DATABASE MANAGEMENT SYSTEMS
- 2. Entities: University Database Table Books Types Authors Students Borrows
- 5. Table definitions Authors Authorid Int ; Primary key Name Varchar(30) Surname Varchar(20) Books Bookid Int; Primary Key title Varchar(40) Pagecount Int sem Int Authorid Int typeid Int Types Typeid Int; PK Name Varchar(20)
- 6. Table definitions Borrows Borrowid Int; Primary key Studentid Int Bookid Int Takendate Date Broughtdate Date Students Studentid Int; Primary key Name Varchar(30) Surname Varchar(30) Birthdate Date Gender Varchar(6) Class Varchar(5) sem int
- 7. Commands to be executed 1. Create Tables authors, books, borrows, students, types 2. Describe the list of column definitions for the tables created 3. Insert values into the tables authors (10 records); books (20 records); types (10 records); borrows (20 records); students (30 records);
- 8. Queries on Library Database 4. List the books where page count is greater than 100 Select * from books where pagecount > 100 5. List the books where pagecount is between 50 and 100 Select * from books where pageCount between 50 and 100; 6. List all the male from class 3A or 3B Select * from students where (class = '3A' or class = '3B') and gender='M'
- 9. Queries on Library Database 7. List the unique class from students Select distinct class from students; 8. List the total number of Male and Females in each class Select class,gender,count(*) as StudentCount from students group by gender,class;
- 10. Queries on Library Database 9. List only the total number of females in each class Select class,gender,count(*) as StudentCount from students where gender = 'F' group by gender,class; 10. List the book with the most page number Select * from books where pageCount=(Select max(pageCount) from books)