Tag: database relationships
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Understanding Primary Keys, Foreign Keys, and Indexes in MySQL
Learn the significance of primary keys, foreign keys, and indexes in MySQL for ensuring data integrity, managing relationships, and optimizing database performance.
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Understanding Cardinality in Database Design
Cardinality in database design defines the number of instances one entity can relate to another. It plays a key role in structuring relationships between tables, ensuring data integrity, and optimizing query performance. The primary types of cardinality are one-to-one, one-to-many, and many-to-many. Understanding cardinality helps in defining database tables and relationships correctly, avoiding redundancy, and…
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Understanding Foreign Keys in Database Design: A Comprehensive Guide
Foreign keys are crucial in relational database design for establishing relationships between tables and ensuring data consistency. They link a column in one table to the primary key of another, maintaining referential integrity and allowing for cascading actions. Proper use of foreign keys ensures that data is consistent and that relationships between entities are valid…