Level 75
Better for maintain and performance is to use a separated table. In this case user_details with user_id as a foreign key.
I am using MySQL as my database. I am thinking to store user details in json type instead of create multiple column to store data. I am storing the details such as tax_number, company_name, address...etc in my order table.
May i know better to separate it out or it's fine to store as json format?
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