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This section seem to contain the definition of "relation" rather than the definition of 1NF. Data being in relational form is a prerequisite for 1NF, but it is not the ''definition ''of 1NF since we can have relations which are ''not ''in 1NF - after all, normalization is defined as bringing non-1NF relations into 1NF. So I suggest either removing this section altogether or moving it to another article, perhaps [[Relation (database)]]. [[Special:Contributions/80.62.117.169|80.62.117.169]] ([[User talk:80.62.117.169|talk]]) 13:51, 11 May 2025 (UTC)
== Drawbacks ==
The section on drawbacks is problematic and lacks sources. The performance concern seem to apply to the relational model as a whole rather than specifically 1NF and would better fit in the articles for [[Relational database]] or [[NoSQL]]. The paragraph about object/relational impedance mismatch also seem misplaced here since again it is not specifically about 1NF. There is already an article about [[Object–relational impedance mismatch]]. Given the lack of sources I suggest we just remove this section though. The controversy about whether complex types are allowed in 1NF already have its own section. [[Special:Contributions/80.62.117.169|80.62.117.169]] ([[User talk:80.62.117.169|talk]]) 14:23, 11 May 2025 (UTC)
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