Ask
Login
0
58kviews
Explain Weak entity set with suitable example.
written 7.8 years ago by gravatar for teamques10 teamques10 ★ 65k modified 19 months ago by gravatar for yashbeer yashbeer ★ 11k

Explain following terms with suitable example.

(i) Weak entity set

(ii) Data manipulation language

(iii) Foreign key

(iv) Super key
database management systems
ADD COMMENT EDIT
1 Answer
0
366views
written 7.8 years ago by gravatar for teamques10 teamques10 ★ 65k

i. Weak entity set:

  • An entity set that does not have a primary key is referred to as a weak entity set.
  • The existence of a weak entity set depends on the existence of a identifying entity set:
    • It must relate to the identifying entity set via a total, one-to-many …

Create a free account to keep reading this post.

and 3 others joined a min ago.

ADD COMMENT EDIT
Please log in to add an answer.