Database Systems (DAT220)

Content

A database is a system for storing and retrieving data, typically working with large amounts of data. A user of computer systems rarely directly interacts with a database since it is more often used by an application that the user is using rather than directly by the user. However, almost all applications nowadays use some form of a database. Understanding databases is thus important both for those who create databases and those who use them in their applications.

This course discusses data modelling, use of relational and non-relational databases, query optimization, transactions, as well as basic indexing structures and search algorithms. Data modeling means setting up a model or overview of the data that one wants to store. Relational databases are the most commonly used form of database system and non-relational databases allow using more flexible data models. Query optimization is a set of methods for designing more efficient queries. Transactions enable more users to use database systems at the same time.

Learning outcome

Knowledge:

• Describe what a relational database is and explain the basics of how a relational database works
• Describe what a transaction is, what properties it has and explain why databases use transactions
• Characterize different kinds of database systems
• Compare and debate different database concepts

Skills:

• Create a data model using ER diagrams
• Design a relational database based on a data model using standard methodology
• Design efficient SQL queries
• Develop an application that uses a database

General competence:

• Apply a database as part of a software development process

Required prerequisite knowledge

Recommended prerequisites

Exam

Coursework requirements

Throughout the semester students work individually on assignments as well as on a practical group project. Both assignments and group projects are mandatory and must be passed within the announced deadline so that the student has the right to take the exam.

Absence due to illness or for other reasons must be communicated to the laboratory personnel as soon as possible. One cannot expect that provisions for completion of lab assignments at other times are made unless prior arrangements with the laboratory personnel have been agreed upon.

Course teacher(s)

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Coordinator laboratory exercises:

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Head of Department:

Method of work

Open for

Course assessment

Literature