Relational Database Management System (RDBMS) Quiz
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Questions and Answers

What is the primary purpose of DQL commands?

  • To control access to data stored in a database
  • To get the schema relation based on the query passed (correct)
  • To manipulate/modify data presented in the database
  • To create and modify database objects

    • What is the relational model of database management system based on?

  • tuple calculus
  • set theory
  • relation algebra (correct)
  • predicate logic

    • What is an example of a DDL command?

  • INSERT
  • GRANT
  • SELECT
  • CREATE (correct)

    • What does NoSQL stand for?

    <p>Not only SQL</p> Signup and view all the answers

    Who invented the Relational Model in 1970?

    <p>Edgar F.Codd</p> Signup and view all the answers

    What is the main characteristic of NoSQL databases?

    <p>No strict following of ACID</p> Signup and view all the answers

    What is the primary purpose of SQL?

    <p>Data querying and management</p> Signup and view all the answers

    What is the primary advantage of In-Memory Database Management Systems (IMDBMS)?

    <p>Optimized work with disks (I/O)</p> Signup and view all the answers

    What is the standard for SQL described in?

    <p>ISO/IEC 9075-1:2016</p> Signup and view all the answers

    What is DQL used for in SQL?

    <p>Data querying and retrieval</p> Signup and view all the answers

    What is the main difference between NoSQL databases and Relational Databases?

    <p>Data structures used</p> Signup and view all the answers

    What is the purpose of Data Control Language (DCL) commands?

    <p>To control access to data stored in a database</p> Signup and view all the answers

    What is the term for a Relational Database Management System?

    <p>RDBMS</p> Signup and view all the answers

    What is the purpose of Data Manipulation Language (DML) commands?

    <p>To manipulate/modify data presented in the database</p> Signup and view all the answers

    What is the primary function of a Relational Database Management System?

    <p>Data manipulation and querying</p> Signup and view all the answers

    What is SQL used for in programming?

    <p>Managing data in a Relational Database Management System</p> Signup and view all the answers

    What is the primary function of a Database Management System (DBMS)?

    <p>To handle, change, and retrieve data in a database</p> Signup and view all the answers

    What is a key component of a Database Management System (DBMS)?

    <p>Metadata</p> Signup and view all the answers

    What is the primary purpose of SQL in a DBMS?

    <p>To manipulate and retrieve data</p> Signup and view all the answers

    What type of database is designed to handle large amounts of unstructured or semi-structured data?

    <p>NoSQL</p> Signup and view all the answers

    What is the main difference between SMP and MPP architectures?

    <p>SMP is designed for small-scale databases, while MPP is designed for large-scale databases</p> Signup and view all the answers

    What is the primary purpose of a RAID system?

    <p>To enhance data redundancy and availability</p> Signup and view all the answers

    What is the definition of a database?

    <p>An organized collection of data</p> Signup and view all the answers

    What is the relationship between a DBMS and its components?

    <p>A DBMS is a software system that manipulates database components</p> Signup and view all the answers

    Study Notes

    Relational Database Management System (RDBMS)

    • A database engine/system/product based on the Relational Model.
    • Invented by Edgar F. Codd in 1970.
    • Presents data to the user as relations (tables with rows and columns).
    • Provides relational operators to manipulate data in tabular form.

    SQL

    • A standard computer language for Relational Database Management System.
    • Used for data manipulation.
    • ISO/IEC 9075-1:2016 describes the conceptual framework used in other parts of ISO/IEC 9075.
    • Consists of:
      • DQL (Data Query Language) - used to perform queries on data within schema objects.
      • DDL (Data Definition Language) - used to create and modify database objects.
      • DCL (Data Control Language) - used to control access to data stored in a database.
      • DML (Data Manipulation Language) - used to manipulate/modify data presented in the database.

    NoSQL

    • A class of Database Management Systems that does not use SQL and does not follow the Relational Model.
    • Does not follow ACID rules.
    • Used for big data and real-time web applications.
    • Data structures used are different from those used in Relational Databases.

    In-Memory Database Management System (IMDBMS)

    • A Database Management System that stores data on main memory.
    • Optimizes work with disks (I/O) by direct data manipulation and specialized architecture (CPU + memory).
    • Enables real-time data movement.

    Database Management System (DBMS)

    • A software product/package/system created to handle/change/retrieve/etc data in a database.
    • Manipulates with data, data formats, metadata, and structures.
    • Defines rules how to work with data.
    • SQL is used in DBMS.

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    Test your knowledge of RDBMS, a database engine/system based on the Relational Model, and its standard language SQL for data manipulation.

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