Multi Association (many to Many)

Multi Association is kind of association in database between 2 tables, generally this is theoretically term.

multi- association reference generally handle by below table, this is also called linking table. It has same synonyms like
cross-reference table,
bridge table,
join table,
map table,
intersection table,
linking table,
link table

Structure Explanation, ( There is 2 table, Customer is one table, Address is second table), I need to create link table where i can store ID of both tables. I will create a table Custom_address whose structure like as below.

Customer
ID	First Name	Last Name	Middle Name
1	Kind	Singh	s.
2	Nice	Singh

Address
ID	State	Country
1	Punjab	India
2	Goa	India
3	New York	United State

Customer_ID column has reference to Customer table, and Address_id column has reference to Address table

Customer Id	Address Id
1	1
1	3
2	1
2	2

Note*- Its also depends upon the database designer, some time user create ID column in link table sometimes not.