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DAD220 Ch 3 Questions and Answers | Latest Update | 2024/2025 | Graded A+
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DAD220 Ch 3 Questions and Answers | Latest Update | 2024/2025 | Graded A+ What is the primary key of the PhoneNumber table? (Area code, Exchange, Number) is unique, non-null, and minimal, so (AreaCode, Exchange, Number) is a primary key. Occasionally, a primary key includes all columns in a t...
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