what is the relationship between weak and strong entity ?

Question

	1:1
	1:M
	M:1
	M:N

Answer 1

A weak entity it self doesn't have a primary key and depends on the strong entity to form a primary key. For example EMPLOYEE can be a strong entity and DEPENDENT a weak entity. An employee can have multiple dependents and a dependent can have multiple concerned employees. So, the relationship is M:N, with the participation of weak entity being TOTAL- there is no dependent without a concerned employee.

Comments

So, one employee can be dependent of many other employees

Also, same employee can depend on multiple other employees. Hence, M:N. 

here both entities are employees so they both are strong  none of them is weak.

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Arjun sir, if it is m:n, in that case we won't be able to uniquely identify weak entities...it has to be 1:m...pls correct me..

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Sir, If M:N relationship is possible, how to generate table for the weak entity set? Do we have to introduce a third table? If so,  will weak entity set continue to have partial keys alone? Please clear my confusion sir...