When mapping a supertype/subtype relationship which of the following is true?

LohaHridoy
  1. The supertype primary key is assigned to each subtype.
  2. The subtype primary key is assigned to each supertype.
  3. There is no link between the supertype/subtype entities.
  4. There is no primary key/foreign key relationship between a supertype/subtype.

0 like 0 dislike
1 views
Share with your friends

1 Answers

AhmedNazir

Call

Answer: Option 1

Let'

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
When an entity instance must be a member of only one subtype, it is which of the following?

Answer: Option 1 Let'

1 Answers 4 views
When an entity instance may be a member of multiple subtypes or it does not have to be a member of a subtype, it is which of the following?

Answer: Option 3 Let'

1 Answers 3 views
Use of a supertype/subtype relationship is necessary when which of the following exists?

Answer: Option 1 Let'

1 Answers 1 views
It is appropriate to use a supertype/subtype relationship when there are attributes that apply to some of the instances of an entity type.?

Answer: Option 1 Let'

1 Answers 1 views
When mapping a many-to-many unary relationship into a relation which of the following is true?

Answer: Option 2 Let'

1 Answers 7 views
When mapping a multivalued attribute into a relation which of the following is true?

Answer: Option 2 Let'

1 Answers 1 views
When mapping a binary many-to-many relationship into a relation which of the following is true?

Answer: Option 3 Let'

1 Answers 2 views
When mapping a ternary relationship with an associative entity into a relation which of the following is true?

Answer: Option 4 Let'

1 Answers 1 views
When mapping a regular entity into a relation which of the following is true?

Answer: Option 1 Let'

1 Answers 1 views
Overlapping and disjoint subtypes have different approaches on how the subtype discriminator is applied.?

Answer: Option 1 Let'

1 Answers 1 views
X