Unlock document.
This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
____________________ is the process that establishes the need for, and the extent of,
an information system.
The inherently complex distributed data environment increases the urgency for standard
protocols governing transaction management.
All simple attributes are also single-valued.
To model time-variant data, you must create a new entity in a M:N relationship with the
original entity.
The ____________________ refers to a specific table row as an entity instance.
The DBA interacts with the end user by providing data and information support services
to the organization's departments.
To deliver efficient decision support, OLAP tools must have advanced data
____________________ features.
In most modern relational DBMSs, a new database implementation requires the
creation of special storage-related constructs to house the end-user tables.
A good relational DBMS excels at managing denormalized relations.
A null is created when you press the Enter key or the Tab key to move to the next entry
without making a prior entry of any kind.
What is an entity cluster?
The idea of determination is unique to the database environment.
Describe a conceptual model and its advantages. What is the most widely used
conceptual model?
In a DDBMS, query ____________________ is used to find the best access strategy.
You can think of a table as a persistent representation of a logical relation.
A(n) ____________________is an orderly arrangement used to logically access rows in
a table.
A relationship is identified by a name that describes the relationship.
As rare as 1:1 relationships should be, certain conditions absolutely requiretheir use.
