1.list names of students who did not registered any course. 2.list names of students who registered for both     "database" and " network" 3. list every pair of student names who have registered the same course. please answer in sql

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Single Table

In a database management system, a single table is designed to obtain data of heterogeneous items. A single-table design with DynamoDB resolves the issue of raising multiple requests for the relevant data of an entity.