Database - Data Modeling with ER Model - Discussion

Discussion Forum : Data Modeling with ER Model - General Questions (Q.No. 18)
18.
Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator?
Supertype entity
Subtype entity
Archetype entity
Instance entity
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
6 comments Page 1 of 1.

Rathod said:   1 decade ago
Discriminator means, if weak entity want to create primary key then its needed some column, which column is nothing but primary key column of strong entity.

In short discriminator = (foreign key + primary key of strong entity).

Rutuja said:   1 decade ago
Weak entity means which doesn't have proper primary key this is called as weak entity.

What is this discriminator?

Dhwani said:   1 decade ago
Isn't that call a weak entity????????

Shashi said:   1 decade ago
What is this discriminator?

Pooja said:   1 decade ago
What is this discriminator?

Aditi singhania said:   8 years ago
Thanks @Rathod.

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