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We can convert any entity set to a strong entity set by simply adding appropriates attributes. Why then, do we have weak entity sets?
written 8.9 years ago by gravatar for meghalikalyankar meghalikalyankar • 2.3k modified 3.0 years ago by gravatar for pedsangini276 pedsangini276 • 4.8k
database management systems
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written 8.9 years ago by gravatar for meghalikalyankar meghalikalyankar • 2.3k

I. Introduction:

  1. An entity set may not have sufficient attributes to form a primary key. Such an entity set is termed as weak entity set.
  2. An entity that has a primary key is termed as strong entity set.

II. Requirement of weak entity sets:

Consider the following example:

Figure 1: Weak Entity Set

Figure 1: …

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