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Exam 6: Relational Databases and Sql

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Question 21

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The following table is a view of BILLING_HOURS from the various data elements in ABC's relational database: Required: a.Using proper SQL commands, develop a query to extract billing data for Fleet Services (client number F11555), showing the employee number, date, hours, and billing rate. b.Design a table showing the output that would be generated based upon your query created above.

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a.SELECT
Employee_No...

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Question 22

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A data field in a traditional file is similar to a relational:

A) table
B) attribute
C) tuple
D) row

E) A) and D)
F) A) and C)

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Question 23

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Students at Macom University use an web-based course registration system.Identify the participation constraint of the following data model relationship.The university maintains student records until they graduate or do not enroll in a course for a 3-year period.

A set of data that describes an instance of the entity represented by a relation is known as a tuple.

The ____________________ command demonstrates one of the weaknesses in most forms of SQL.

A(n) _________________________ is the attribute whose value is unique for every entity that will ever appear in the database.

Which is not a step in creating a relation using SQL?

____________________ map and define the way in which data can be extracted from a database.

A(n) ____________________ is an item of data that characterizes an entity or relationship.

____________________ is a powerful database language that can be used to define database systems, query the database for information, generate reports from the database, and access databases from within programs using embedded commands.

The fundamental requirement for moving toward an event driven model is the complete integration of data related to an organization's business events.

Which of following is not a step in the process for specifying relations based on REA diagrams?

The notation of (1,1) is used to specify the relationship type of one to many.

___________________________________ specifies that for every attribute value in one relation that has been specified to allow reference to another relation, the tuple being referenced must be intact.

Which relationship type does (1, N) mean?

The ______________________________ specifies the degree of minimum participation of one entity in the relationship with the other entity.

To generate a standard report of a relational database, which of the following SQL commands would be used?

Based on the following abbreviated description of Avery University's course scheduling and student advising procedures, prepare an Entity-Relationship (E-R) diagram that reflects the key entities and relationships.Course Scheduling: In consultation with the vice-president of Academic Affairs and the Registrar's Office, each academic department chair decides which courses will be offered each semester and how many sections of each course will be scheduled.Courses are scheduled in sections meeting at different times over the course of the week.Some courses are scheduled in multiple sections.The department chair also assigns a faculty member who teaches for his/her department to teach each course-section.Students enroll in courses-sections by submitting their schedule selections to the Registrar's Office.In assigning students to sections, the Registrar gives preference to students based on their class standing (i.e., Senior, Junior, Sophomore, and Freshman).Student Advising: Student academic advising is done according to each student's major.Each student chooses a faculty advisor from his/her major department.While each student has only one "official" academic advisor, each faculty person advises several students, up to a maximum of 15 advisees.

An entity can be classified as all of the following except

Which of the following is not a proper SQL command for creating database relations?