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This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-05-12 and was most recently seen on 2026-05-12.
First normal form (1NF) is the most basic level of database normalization defined by English computer scientist Edgar F. Codd, the inventor of the relational database. A relation can be said to be in first normal form if each field is atomic, containing a single value rather than a set of values or a nested table. In other words, a relation complies with first normal form if no attribute domain has relations as elements.
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