Multiple Choice
Which of the following notations in an E-R diagram means that the entity is optional and a relationship need not have an entity of that type?
A) vertical bar
B) arrow
C) double line
D) small oval
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q16: Albert creates a relational database to store
Q17: In a data model, a(n)_ is something
Q18: Which of the following statements correctly describes
Q20: Brenda, the sales manager of a firm,
Q22: Which of the following is an example
Q23: Samuel is the database administrator for Zimline
Q24: In a database, _ are grouped into
Q25: Which of the following is true of
Q45: Explain how a database management system processes
Q94: Define the symbols and terms used in