Database - Data Models into Database Designs - Discussion
Discussion Forum : Data Models into Database Designs - True or False (Q.No. 19)
19.
For every relationship, there are six possible referential integrity actions.
Discussion:
2 comments Page 1 of 1.
Pranavkuls said:
1 decade ago
Each relationship there are six possible actions for which referential integrity can be defined:
PARENT INSERT.
PARENT UPDATE.
PARENT DELETE.
CHILD INSERT.
CHILD UPDATE.
CHILD DELETE.
PARENT INSERT.
PARENT UPDATE.
PARENT DELETE.
CHILD INSERT.
CHILD UPDATE.
CHILD DELETE.
Geek guy said:
1 decade ago
For 1:1 - only 1 referential integrity action is there.
For 1:N - only 1 referential integrity action is there.
For M:N - there are 2 referential integrity actions.
In total there are four. Answer should be false.
For 1:N - only 1 referential integrity action is there.
For M:N - there are 2 referential integrity actions.
In total there are four. Answer should be false.
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