What is the difference between weak entity and sub type

Questions by suresh.kalyadapu

Showing Answers 1 - 3 of 3 Answers


  • Dec 24th, 2008

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.


  • Oct 5th, 2010

Weak Entity is entity dependeant on other entity.

Subtypes are data types inherited from basic data types in Oracle. we can specify additional constraint on subtype while defining them.

  Was this answer useful?  Yes

hafiz rafaqat

  • May 31st, 2014

what is the difference bw time stamp and subtype discriminator?

  Was this answer useful?  Yes

Give your answer:

If you think the above answer is not correct, Please select a reason and add your answer below.


Related Answered Questions


Related Open Questions