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I was convinced that what violated the first normation rule was having a multivalued column.

 id  name    friends
 1   'john'  'Maycon, Gabriel'

That has multiple names in the same column.

Compound columns don't violate the rule because they are atomic.

 id  name    localization
 1   'john'  'SP, Brazil'

That is not multivalued, it is just compound.

But now I read that just having a table with a primary key is enough to have the first normalization rule met.

What is correct?

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