Second Normal Form (2NF) further addresses the concept of removing duplicate data as follows:
- Remove subsets of data that apply to multiple rows of a table and place them in separate tables.
- Create relationships between these new tables and their predecessors through the use of foreign keys.
First Normal Form (1NF) sets the very basic rules for an organized database as follows:
- Eliminate duplicate columns from the same table.
- Create separate tables for each group of related data and identify each row with a unique column or set of columns (i.e., primary key).
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