Database Systems Chapter 4 Flashcards
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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?

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

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

<p>to be shown in the query result.</p> Signup and view all the answers

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

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

SAP modules available for implementation include?

<p>Financial accounting, Payroll, and Sales and Distribution.</p> Signup and view all the answers

Cloud computing is?

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

What kind of relationship does a network data model represent?

<p>Many-to-many relationship</p> Signup and view all the answers

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

<p>Cash receipt number</p> Signup and view all the answers

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

<p>SELECT</p> Signup and view all the answers

The GROUP BY operator in SQL is used to?

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

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

<p>store data</p> 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.

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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.

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