Budapest University of Technology and Economics, Faculty of Electrical Engineering and Informatics

    címtáras azonosítással

    vissza a tantárgylistához   nyomtatható verzió    


    A tantárgy neve magyarul / Name of the subject in Hungarian: Adatbázisok

    Last updated: 2016. május 24.

    Budapest University of Technology and Economics
    Faculty of Electrical Engineering and Informatics
    Software engineering BSc program 
    Course ID Semester Assessment Credit Tantárgyfélév
    VITMAB00 3 3/1/0/v 5  
    3. Course coordinator and department Dr. Gajdos Sándor,
    Web page of the course
    4. Instructors Dr. Gajdos, Sándor, Department of Telecommunications and Media-informatics 
    5. Required knowledge Basic technical knowledge about programming languages, data structures, algorithms, operating systems
    6. Pre-requisites
    (TárgyEredmény( "BMEVISZAA01" , "aláírás" , _ ) = -1
    VAGY TárgyEredmény( "BMEVISZAA04" , "aláírás" , _ ) = -1
    VAGY TárgyEredmény( "BMEVISZA110" , "aláírás" , _ ) = -1)

    ÉS NEM ( TárgyEredmény( "BMEVITMA311", "jegy" , _ ) >= 2
    VAGY TárgyEredmény("BMEVITMA311", "FELVETEL", AktualisFelev()) > 0
    VAGY TárgyEredmény( "BMEVITMAB04", "jegy" , _ ) >= 2
    VAGY TárgyEredmény( "BMEVITMAB04" , "aláírás" , _ ) = -1
    VAGY TárgyEredmény("BMEVITMAB04", "FELVETEL", AktualisFelev()) > 0)

    A fenti forma a Neptun sajátja, ezen technikai okokból nem változtattunk.

    A kötelező előtanulmányi rend az adott szak honlapján és képzési programjában található.

    7. Objectives, learning outcomes and obtained knowledge To make students familiar with the operation and usage of database management systems. Application of the theory also in the engineering practice focusing on relational systems.
    8. Synopsis
    • Data and information, structured, non-structured and semistructured data


    • Database management systems, components, operation


    • Data Definition Language, Data Manipulation Language, Host language


    • Layered model of DBMS, principle of data independence


    • Data models, data modelling.


    • Entity-relationship model/diagram, attributes, relationship-types, constraints, specialization, weak entity sets.


    • Relational data model, relational algebra


    • Design of relational schemes from E/R diagram


    • Tuple relational calculus, domain relational calculus, safe expressions.


    • Functional dependencies, determinant, key, superkey, candidate key


    • Armstrong axioms, soundness and completeness, derivation rules


    • Normal forms of 0NF, 1NF, 2NF, 3NF, BCNF


    • Closure of dependency sets, closure of attribute sets


    • Decomposition of relational schemes. Lossless and dependency preserving decompositions. Decomposition in a given normal form.


    • Fundamentals of transaction management
    9. Method of instruction Interactive lectures in a small group with built-in practices
    10. Assessment
    1. In the teaching period: 5-6 midterm tests, similar to real, numerical engineering problems. Scoring: from 1 to 5, 1 is the weakest grading. In case of any serious or fundamental mistake, the grading will be 1. Condition for the signature is passing the tests in average. The weakest test result will be ignored.


    2. In the exam's period: written exam, similar to the problems of the midterm tests. Scoring condition for successful exam is at least 40%. Below 40% the exam is unsuccessful. 
    11. Recaps Accordig to the Code of Studies and Exams
    12. Consultations Individual consultation: upon agreement with the lecturer.
    13. References, textbooks and resources Recommended books:
    • Ullman: Principles of Database and Knowledge-Base Systems, Comp. Sci. Press vol. I-II, 1990.

    • Ullman-Widom: First Course in Database Systems, 2007.


    • Ullman: Principles of Database Systems, Comp. Sci. Press 1982. (with recommended excercises)
    14. Required learning hours and assignment
    Kontakt óra56
    Félévközi készülés órákra28
    Felkészülés zárthelyire40
    Házi feladat elkészítése-
    Kijelölt írásos tananyag elsajátítása-
    15. Syllabus prepared by Dr. Gajdos, Sándor,