Second Normal Form

Second Normal Form (2NF) is a concept in organizing data within a database to reduce redundancy and improve efficiency. It ensures that each piece of data depends entirely on the primary identifier (primary key) of a record. Specifically, it means that all non-key information must be directly related to the main identifier, avoiding situations where some data only relates to part of the key. This helps prevent duplication and inconsistencies, making the database more reliable and easier to maintain. Essentially, 2NF makes sure that data is stored in a way that every fact is uniquely and fully linked to its main record.