Why does metadata have to stored in table cells according to Codd's 12 rules
Metadata isn't uniquely more important than non-metadata in this context. Rather, his rule just simply wants the reader to realize that &quot;All Information&quot; is inclusive of even the metadata regarding the database itself. This is useful for understanding the structure of the database and the relational model behind it. This is why the Information Schema is part of the ANSI SQL standards.