Attributes - Definition - Database

Q.  Which of the following has a relationship between / among themselves as a functional dependency?
- Published on 26 Aug 15

a. Rows
b. Relations
c. Attributes
d. Tables

ANSWER: Attributes


  • Nirja Shah   -Posted on 03 Nov 15
    - A single data item related to a database object. The database schema associates one or more attributes with each database entity.

    - A row is also called as a record or a tuple which represents a single, implicitly structured data item in a table. In simpler terms, a database table can be thought of as consisting of rows and columns or fields.

    - A table is a set of data elements (values) which uses a model of vertical columns (identifiable by name) and horizontal rows, the cell being the unit where a row and column intersect. A table has a specified number of columns, but can have any number of rows.

    - A relation was defined by E. F. Codd it is a set of tuples (d1, d2, ..., dn), where each element dj is a member of Dj, a data domain.

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