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Define weak and strong entity sets?
Weak entity set: entity set that do not have key attribute of their own are known as weak entity sets.
Strong entity set: Entity set that has a primary key is term a strong entity set.
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An example of a weak entity is Staff because the availabilityID cannot be uniquely identified unless it is used in conjunction with the foreign key known as availabilityID in the A
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In E-R diagram how generalization is represented? in E-R diagram generalization is represented by Triangle shape.
Which database object does not physically exist? A view database object does not physically exist.
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