Database - Organized collection of data stored electronically., MySQL - Popular open-source relational database software., Inflexible - Main disadvantage of hierarchical databases., Security - DBMS function that protects data from unauthorized access., Conceptual - Level describing the logical structure of an entire database., Composite - Key made of two or more attributes., Entity - Ensures each table record is unique and not null., Create - SQL command that creates database objects., NoSQL - Database type suited for unstructured, large-scale data., Normalization - Process that removes redundancy and improves data structure.,

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