# Question

Explain the distinction between disjoint and overlapping constraints.

## Answer to relevant Questions

Explain the distinction between total and partial constraints. Design a relational database for a university registrar’s office. The office maintains data about each class, including the instructor, the number of students enrolled, and the time and place of the class meetings. For ...Consider the relational database of Figure. Give an expression in the relational algebra for each request:a. Modify the database so that Jones now lives in Newtown.b. Give all employees of First Bank Corporation a 10 percent ...Let R = (A, B) and S = (A, C), and let r(R) and s(S) be relations. Write relational-algebra expressions equivalent to the following domain-relationalcalculus expressions: a. {< a > | ∃ b (< a, b >∈ r ∧ b = ...Let R = (A, B) and S = (A, C), and let r(R) and s(S) be relations. Write an expression in SQL for each of the queries below: a. {< a > | ∃ b (< a, b >∈ r ∧ b = 17)} b. {< a, b, c > | < a, b >∈ r ...Post your question

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