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A grouping of characters into a word, a group of words, or a complete number is called a record.
In normalization, complex groupings of data are streamlined to eliminate awkward many-to-many relationships.
OLAP is used to find hidden patterns and relationships in large databases, and infer rules from these to infer future behavior.
a firm's information policy lays out who is responsible for updating and maintaining the information in a database system
what is the first step you should take in managing data for a firm?
identify the data needed to run the business
Which of the following best illustrates the relationship between entities and attributes?
The entity CUSTOMER with the attribute ADDRESS
What are the relationships that the relational database is named for?
Relationships between entities
The most basic business database is comprised of:
five tables: for customers, employees, suppliers, products, and sales.
A field identified in a record as holding the unique identifier for that record is called the:
A one-to-one relationship between two entities is symbolized in a diagram by a line that ends:
in two short marks
A table that links two tables that have a many-to-many relationship is often called a(n):
the selection operation:
creates a subset consisting of all records in the file that meets stated criteria.
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