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In the study of databases, one of the key requirements is to query information effectively to support decision-making. A common example arises in the academic domain, where institutions maintain databases containing details of programmes, students, courses, and enrollments. The question of listing programmes that have no students enrolled can be answered by understanding relational models and applying appropriate queries using SQL. Consider a typical university database schema where there are two major relations. The first relation is the Programme relation, which stores details about each academic programme such as ProgrammeID, ProgrammeName, Duration, and Department. The second relation is the Student relation, which includes attributes such as StudentID, StudentName, ProgrammeID, and AdmissionYear. In this case, the Student relation includes a foreign key referencing the Programme relation, thereby ________ _________ _________ _____ ____.
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