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DB Midterm Review

QuestionAnswer
Select the option that is NOT one of the limitations for traditional file-based systems. Data Independence Data Independence
A Database Management System (DBMS) consists of a Data Manipulation Language (DML) and a Data Definition Language (DDL) that is implemented using what type of query language? Structured Query Language Structured Query Language
The Data Manipulation Language (DML) entails all of the following operations except what? Creation of the schema for the database Creation of the schema for the database
A database system consists of entities which use _____________that describe properties of an entity and ________________showing how the entities are related. Attributes Relationships
The need for enterprise scalability motivated the creation of a three-tier client-server architecture which entails the following three tiers: Client, Application Server, Database Server Client, Application Server, Database Server
In a relational data structure, a _________is a table with columns and rows, an attribute is a named _________, a set of allowable values on one or more attributes is a _______________, and a ___________is a row of a relation. Relation, Column Domain, Tuple
Relational keys ensure that there are no duplicate records. A(n) ________________ is a candidate key selected to identify tuples uniquely within the relation. A(n)______________ is within one relation that matches the candidate key of some relation. Primary key Foreign key
Integrity constraints are a part of the relational data model to protect the integrity of the database. In regards to ___________, no attribute of a primary key can be null in the base relation. Entity Integrity Entity Integrity
What is NOT a purpose of views in a database management system? To enable the updates of numerous relations To enable the updates of numerous relations
For the select operation in Relational Algebra, the ___________ appears in the subscript and the ____________ argument appears in the parenthesis after the sigma. Predicate Relation
Purpose of Logical Database Design Create well-structured tables that reflect the needs/environment of the user/business Consider how well the model is able to support future possible developments of the DB
Purpose of Logical Database Design Transform a conceptual data model into a logical/physical data model that reflects the needs of the business Structure the data in structures that are not likely to change and that have minimal redundancy
SQL Structured Query Language Structured Query Language
Purpose of Design Methodology A structured approach that uses procedures, techniques, tools, & documentation aids to support and facilitate the process of design Helps the designer to plan, manage, control, and evaluate database development and managing projects
Main Phases of Database Design Conceptual, Logical, Physical Conceptual, Logical, Physical
Important Factors in the Success of DB design Work interactively with the users as much as possible. Follow a structured methodology throughout the data modeling process. Employ a data-driven approach. Incorporate structural and integrity considerations into the data models.
Created by: Tain45
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