How can triggers be used to enforce required children

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Reference no: EM131219913

a. What is a trigger? How can triggers be used to enforce required children?

b. Explain why the enforcement of M-M relationships is particularly difficult.

c. Explain the need for each of the design decisions in Figure 6-33.

d. Explain the implications of each of the minimum cardinality specifications in Figure 6-38.

e. Explain the rationale for each of the entries in the table in Figure 6-40.

Reference no: EM131219913

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