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What is the difference between weak entity and sub type?
By Balu Prasad
Hi,

What is the difference between weak entity and sub type
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Teacher SiliconIndia replied to Balu Prasad Monday, November 23, 2009
Hi balu,

Weak entity means- existence depends on existence of another entity (example:Employee:Dependant)
SubType related to a SuperType with unique attributes - Specialization Subtypes are said to Inherit characteristics from its SuperType.