What is the best approach in this case:
Create a single address table (id, country, city, boulevard, street)
or do 3 as follows:
country (id, country)
cities (id, city, id_country)
address (id, id_country, id_city, boulevard, street)
or
country (id, country)
cities (id, city, id_country)
address (id, id_city, boulevard, street)
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