Question

how many types of mappind cardinalities are there? explain
​

Answer 1

Explanation:

there are four possible mapping cardinalities in this case : one to one an entity in A is related to at most entity in B , and entity in B is related to at most one entity in A one to many and entity in A is related to any number of entities in B, but an entity in B is related to at most one at most one entity in A .

hope it helps you