How do you find non prime attributes?

Answer: Non-prime attributes in DBMS are those that are not part of candidate keys or the primary key.

Identify Prime Attributes

Begin by recognizing prime attributes, which are components of candidate keys or the primary key, playing a crucial role in uniquely identifying records.

Understand Functional Dependencies

Analyze functional dependencies to distinguish non-prime attributes—those not part of any candidate key or the primary key—from prime attributes.

Examine Partial Dependencies

Look for partial dependencies, where an attribute relies on only a part of a candidate key, indicating its non-prime status.

Check Transitive Dependencies

Examine transitive dependencies, highlighting non-prime attributes that depend on other non-prime attributes, indirectly linked to a candidate key.

Normalization Process

During normalization, identify non-prime attributes as those not contributing to candidate keys or primary keys but present in the table.

Remove Redundancy

Non-prime attributes often lead to redundancy, especially if they can be derived from other attributes in the table.

Consider Business Rules

Account for business rules; non-prime attributes may include additional information beyond the unique identification of records.

Review Data Model

Assess the data model and entity relationships to spot non-prime attributes that may not play a key role in establishing relationships between entities.