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Difference Between Strong and Weak Entity
In this post, we will understand the difference between strong entity and weak entity −
It has primary key.
It doesn’t depend on any other entity.
It can be represented using a single rectangle.
The relationship between two strong entities can be represented using a single diamond.
It can either have total participation or no participation.
A weak entity has a partial discriminator key.
It depends on the strong entity.
It can be represented using a double rectangle.
The relationship between a strong and a weak entity can be represented using a double diamond.
They always have total participation.
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