Database Systems Chapter 4 Flashcards

Questions and Answers

In the hierarchical data model, the mapping from parent to child is?

1:N (one-to-many)

Advantages of relational data models generally include?

reduced information redundancy

A class in a relational database model is defined as?

person, place, thing, transaction, or event about which information is stored.

Which statement about enterprise systems is correct?

SAP, Oracle, and Microsoft all offer products for enterprise systems. Signup and view all the answers

The FROM clause to the SELECT statement used in SQL states the criteria that must be met?

to be shown in the query result. Signup and view all the answers

The 'ORDER BY Amount ASC' clause to the SELECT statement suggests that?

the amount of the query result will be listed in ascending order. Signup and view all the answers

SAP modules available for implementation include?

Financial accounting, Payroll, and Sales and Distribution. Signup and view all the answers

Cloud computing is?

internet-based computing, where shared resources, software, and information are provided to firms on demand. Signup and view all the answers

What kind of relationship does a network data model represent?

Many-to-many relationship Signup and view all the answers

Which one of the following is a valid primary key for a cash receipt table?

Cash receipt number Signup and view all the answers

Which of the following is used in SQL to begin a query?

SELECT Signup and view all the answers

The GROUP BY operator in SQL is used to?

aggregate functions the query results based on one or more columns. Signup and view all the answers

When using Microsoft Access, the main function of 'Table' is to?

store data Signup and view all the answers

Study Notes

Hierarchical Data Model

In the hierarchical data model, the relationship from parent to child is defined as 1:N (one-to-many).

Relational Data Model Advantages

Advantages of relational data models include reduced information redundancy.

Definition of a Class

A class in a relational database model refers to a person, place, thing, transaction, or event about which information is stored.

Enterprise Systems

Correct statement: SAP, Oracle, and Microsoft offer products for enterprise systems.

SQL FROM Clause

The FROM clause in a SQL SELECT statement determines the criteria required to be included in the query result.

SQL ORDER BY Clause

The clause "ORDER BY Amount ASC" in SQL indicates that the results will be sorted in ascending order based on the amount.

SAP Modules

Available SAP modules for implementation include Financial Accounting, Payroll, and Sales and Distribution.

Cloud Computing

Cloud computing is defined as internet-based computing, where firms access shared resources, software, and information on demand.

Network Data Model Relationships

The network data model represents many-to-many relationships.

Primary Key for Cash Receipt Table

A valid primary key for a cash receipt table is the cash receipt number.

Starting an SQL Query

The SQL command used to begin a query is SELECT.

GROUP BY Operator in SQL

The GROUP BY operator is employed in SQL to aggregate function results based on one or more specified columns.

Function of Table in Microsoft Access

In Microsoft Access, the primary function of a "Table" is to store data.

Description

Test your knowledge with these flashcards covering key concepts from Chapter 4 of Database Systems. Explore important terminology and definitions related to hierarchical data models and relational databases. Perfect for reinforcing your understanding of relational database structures and advantages.