Project #04: Databases and AVL Trees (Solved)

computer science

Description

Background




 Conceptually, a database is a set of tables, where each table stores data that is logically related. For example, the database maintained by UIC would include the following tables: students: data about each student faculty: data about each faculty member staff: data about each staff employee courses: data about each course Databases are created, searched and modified using the SQL programming language. For example, here’s an SQL select query to retrieve all the info from the students table about the student with netid fzizza2: select * from students where netid = fzizza2 How are databases implemented? Each table is stored in a file, and balanced trees are built to index the file and find data quickly. For example, suppose student fzizza2 has their data stored at position 2048 in the underlying file (which would be called “students.data” based on the tablename). This file would be indexed by a tree consisting of (uin, offset) pairs, and this student’s node in the tree would contain the pair (fzizza2, 2048).Background Conceptually, a database is a set of tables, where each table stores data that is logically related. For example, the database maintained by UIC would include the following tables: students: data about each student faculty: data about each faculty member staff: data about each staff employee courses: data about each course Databases are created, searched and modified using the SQL programming language. For example, here’s an SQL select query to retrieve all the info from the students table about the student with netid fzizza2: select * from students where netid = fzizza2 How are databases implemented? Each table is stored in a file, and balanced trees are built to index the file and find data quickly. For example, suppose student fzizza2 has their data stored at position 2048 in the underlying file (which would be called “students.data” based on the tablename). This file would be indexed by a tree consisting of (uin, offset) pairs, and this student’s node in the tree would contain the pair (fzizza2, 2048).


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