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What is TRUE about the Active/Dynamic Online Catalog based on the relational model in the 12 Codd's Rules?

6. What is TRUE about the Active/Dynamic Online Catalog based on the relational model in the 12 Codd's Rules?

1. The primary key value, table name, and column name are characteristics that allow us to access the precise data (atomic value) logically from a relational database.
2. Null values are treated in database records according to this rule.
3. Database dictionaries represent the complete logic of all descriptive data, which must be stored online.
4. None of the above

Answer: C) Database dictionaries represent the complete logic of all descriptive data, which must be stored online

Explanation:

In the case of Active/Dynamic Online Catalogue based on the relational model in the 12 Codd's Rules, Database dictionaries represent the complete logic of all descriptive data, which must be stored online.