Lesson 3: Understanding Data Dependence and Redundancy in Databases

Copyright Law

Legal framework protecting original works' rights.

Data Processes

Operations for managing and manipulating data.

Database Management

Systematic organization of data for retrieval.

Structural Dependence

Access reliant on file structure changes.

Structural Independence

Changes in structure don't affect data access.

Data Dependence

Data access changes with storage characteristics.

Data Independence

Storage changes don't affect data access methods.

Logical Data Format

Human-readable representation of data.

Physical Data Format

Computer's method of processing data.

Data Redundancy

Unnecessary duplicate data stored in multiple locations.

Data Inconsistency

Conflicting data versions across different locations.

Data Integrity

Consistency of data with real-world conditions.

Insertion Anomaly

Failure to insert data due to missing information.

Update Anomaly

Time-consuming updates across multiple data copies.

Deletion Anomaly

Loss of unrelated data when deleting records.