Universal relation assumption
The universal relation assumption in relational databases states, that one can place all data attributes into a (possibly very wide) table, which may then be decomposed into smaller tables as needed.
However, the assumption that a single large table can capture real database designs is often plagued with a number of difficulties. The "nested universal relation" model has attempted to address some of the problems and offer improvements.
- Who won the Universal Relation wars? by Alberto Mendelzon
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