Top Posters
Since Sunday
w
3
w
3
e
3
3
r
3
b
2
M
2
V
2
f
2
c
2
c
2
K
2
Home Q & A Board Science-Related Homework Help Computer Studies
New Topic  
lbelcher lbelcher
wrote...
Go to Answer
Posts: 482
Rep: 20 0
5 years ago
For the M-O (parent mandatory, child optional) case, what action(s) should be taken to ensure minimum cardinality is maintained?

• Define referential integrity constraint from child to parent

• Make foreign key NOT NULL

• Will require trigger or other application code

• Both Define referential integrity constraint from child to parent and Make foreign key NOT NULL are correct
Textbook 
Database Processing: Fundamentals, Design, and Implementation

Database Processing: Fundamentals, Design, and Implementation


Edition: 15th
Authors:
Read 117 times
1 Reply
Replies
Answer verified by a subject expert
NashuaNashua
wrote...
#1
Posts: 380
Rep: 47 1
5 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here

Related Topics

lbelcher Author
wrote...

5 years ago
This site is awesome
lierac00
wrote...

Yesterday
You make an excellent tutor!
amandamraz
wrote...

2 hours ago
Correct Slight Smile TY
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  495 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 1009
  
 6677
  
 676
Your Opinion
Which 'study break' activity do you find most distracting?
Votes: 824
Previous poll results: Do you believe in global warming?