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Can you explain how a relational database works?

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A relational database is a type of database that organizes data into related tables. Each table in the database has a unique identifier called a primary key, which allows for easy linking and referencing between tables. This allows for efficient data retrieval and manipulation through the use of SQL (Structured Query Language) commands. The relationships between tables are defined through the use of foreign keys, which link one table's primary key to another table's foreign key. This creates a relational structure, where data can be easily accessed and related to other data in the database. Overall, a relational database allows for a flexible and efficient way to store and manage large amounts of data.