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I have a table called “restaurants” which contains each restaurant information, I want to add its phone numbers.
Should I make another table called say “phones” with fields “phone1”, “phone2”, “phone3”, etc, then make a relation between them? or their is an easier way to do this?
You could make a table called “PHONE_NUMBERS” that has 2 column: “RESTAURANT_ID” and “NUMBER”. Yes, the RESTAURANT_ID would have a relationship to the RESTAURANTS table.
You do this since you don’t know how many phone numbers a restaurant could have. It could have 1 number, it could have 200 numbers. This design allows you to be flexible for how many phone numbers are attached to a restaurant.