Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

Hello, can someone please solve the folowing question for me ? thanks in advance Consider two E-R models. Model A consists of two entities and

Hello, can someone please solve the folowing question for me ? thanks in advance

Consider two E-R models. Model A consists of two entities and one relationship joining them. The entities are lecturer and course and the relationship is teaches. The second model consists of three entities; the first and the third are the same as above but the second entity is called lecture. The first and second entities are joined by a relationship called gives while the second and the third entities are joined by a relationship called of.

Which two of the following are correct? Briefly justify your answers.

(A) Both models allow a course to have more than one lecture from the same lecturer

(B) Model B is more appropriate if information about all lectures, past and present, is to be stored

(C) Model A does not allow lecture date and time to be stored

(D) Model B leads to more tables than Model A does when translated to the relational model

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Advanced MySQL 8 Discover The Full Potential Of MySQL And Ensure High Performance Of Your Database

Authors: Eric Vanier ,Birju Shah ,Tejaswi Malepati

1st Edition

1788834445, 978-1788834445

More Books

Students also viewed these Databases questions