The following are features of a database except

Here are the answers to your questions:

17. Another name for a database table is ............

    • a. Datasheets
    • b. Dataset
    • c. Dataunit
    • d. Relation

    In relational database theory, a table is formally known as a Relation.

    The correct option is $\boxed{\text{d. Relation}}$

18. The horizontal component of database table is known as......

    • a. Record
    • b. Field
    • c. Dataset
    • d. Relation

    A horizontal component in a database table represents a single entry or row, which is called a Record.

    The correct option is $\boxed{\text{a. Record}}$

19. The vertical component of database table is known as......

    • a. Record
    • b. Field
    • c. Dataset
    • d. Relation

    A vertical component in a database table represents a category of data for all records, which is called a Field.

    The correct option is $\boxed{\text{b. Field}}$

20. The following are features of a database except

    • a. Forms
    • b. Queries
    • (Options c and d are not visible in the image)

    Forms and Queries are both fundamental features of a database management system. Since options c and d are not visible, it is not possible to identify the exception.