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EF core relational database

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I have some question related to EF core.

1) Is it good to use relational database in EF core 2.1?

2) If i want to maintain one to one relation between then do i need to define navigation property in both entity(parent, child entity)?

3) i want to use the structure like below FK_ParentId is the foreign key which may be TeacherId or StudentId, How may i build the relationship while creating model in DBContext,

       i) I don't want to keep navigation property in Address?

       ii) If want to maintain one to one relationship, then how may i do it?

       ii) It might be possible, A student might have more then one Address. so how to achieve this?

     Class Address {

                  AddressId

                   FK_ParentId

                  Address

                   City

       }

     Class Student {

                  StudentId

                  Name

                   Address address

       }

     Class Teacher {

                  TeacherId

                  Name

                   Address address

       }





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