Referential-integrity constraints as defined in this, Ask an Expert

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Referential-integrity constraints as defined in this chapter involve exactly two relations. Consider a database that includes the relations shown in Figure 4.12. Suppose that we wish to require that every name that appears in address appears in either salaried worker or hourly worker, but not necessarily in both.

a. Propose a syntax for expressing such constraints.

b. Discuss the actions that the system must take to enforce a constraint of this form.

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Computer Engineering, Engineering

Category:- Computer Engineering
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