« previous next »

Author Question: For the M-O (parent mandatory, child optional) case, what action(s) should be taken to ensure ... (Read 35 times)

JGIBBSON

  • Hero Member
  • *****
  • Posts: 538
on: Jul 7, 2018
For the M-O (parent mandatory, child optional) case, what action(s) should be taken to ensure minimum cardinality is maintained?
 
  A) Define referential integrity constraint from child to parent
  B) Make foreign key NOT NULL
  C) Will require trigger or other application code
  D) Both A and B are correct

Question 2

The data model produced by reverse engineering is a(n) ________.
 
  A) conceptual schema
  B) internal schema
  C) dependency graph
  D) table-relationship diagram


Jossy

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 7, 2018
Answer to Question 1

D

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Normal and mutant homeotic gene action in Arabidopsis Normal and mutant homeotic gene action in Arabidopsis
Hydrocephalus. The figure on the left is a child with the enlarged ventricles of hydrocephalus. The Hydrocephalus. The figure on the left is a child with the enlarged ventricles of hydrocephalus. The
Mechanism of action of coagulation modifiers. Mechanism of action of coagulation modifiers.
The breaking down of a sound—in this case, the sound of a clarinet—into its component sine waves ... The breaking down of a sound—in this case, the sound of a clarinet—into its component sine waves ...
Mechanisms of action of drugs to treat angina pectoris Mechanisms of action of drugs to treat angina pectoris
Video: Mutations and translation

For a complete list of videos, visit our video library