Section outline

  • This exercise aims to develop students' understanding of relational algebra by practicing the formulation of precise queries over a given relational schema. It reinforces core database concepts such as selection, projection, join, union, and difference, while enhancing logical reasoning and query-building skills. Through real-world scenarios—like managing geopolitical data or tracking meals and guest preferences—students learn how to model data relationships, interpret schema constraints, and translate everyday information needs into formal database operations, preparing them for practical database use and theoretical comprehension alike.