# Duplicated Denormalized Columns

> The same fact copied into many columns and rows, so updates must touch every copy or leave them inconsistent.

Record: `lex:duplicated-denormalized-columns`
Kind: anti-pattern
Layer: [Contracts Core](https://banes-lab.com/records/layer/contracts-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lex-duplicated-denormalized-columns

## category

- [Schema / Canonical Data / Semantics](https://banes-lab.com/records/lex-category/schema-canonical-data-semantics.md)

## referenced-by

- [Database Normalization](https://banes-lab.com/records/arch/database-normalization.md)