A partial dependency happens when an attribute that is dependent on a portion of the primary key not on the entire key.

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Partial dependency occurs when an attribute depends only on a part of the primary key, not on the entire key. This leads to data redundancy and inconsistencies and violates the rules of database normalization. To avoid this, we need to decompose the table into smaller tables to eliminate partial dependencies.

A Partial Dependency Happens When an Attribute That Is Dependent