Join Operations
Explore join operations to combine data from multiple tables using Theta Join, Equi Join, and Natural Join techniques. Understand the Division operator for all-quantifier queries. This lesson helps you express these joins in relational algebra and apply them for practical database querying.
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Imagine our OnlineStore is going very well and we want to see the name of every product along with its supplier’s name. But these two pieces of information live in separate tables: Products and Suppliers. How do we bring this information together? This is where join operations come into play. Join operations are the backbone of relational databases, allowing us to connect data across multiple tables to answer complex questions that a single table alone cannot. ...