<ul><li>A foreign key is a field (or collection of fields) in one table that uniquely identifies a row of another table.</li><li>The purpose of a foreign key is to maintain referential integrity between the two tables.</li><li>In this article, we explored the concept of foreign key relationships in SQL, demonstrated how to create tables and insert data, and performed a JOIN operation to retrieve combined data from related tables.</li><li>Understanding these fundamentals is essential for designing efficient databases and performing complex queries to gain insights from your data.</li></ul>

Understanding SQL Foreign Keys and Joins for Effective Data Management

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