primary and foreign keys

A

amod

hi,

i am confused between these keys. say i create two tables. Now, i
would like to know - which table i need to create primery key and in
which table foreign key, how do i relate them when i write a query.

While creating foreign key do we have to mention that this key has
primery key in some perticular table.

i have not understood the concept. pl explain

amod
 

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