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Identifying transitive dependencies

Imagine that a nation-wide database of schools exists. Someone who is unfamiliar with database normalization proposes the following structure for the school table:

CREATE TABLE school (
    id serial PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    street_address VARCHAR(100) NOT NULL,
    city VARCHAR(50) NOT NULL,
    state VARCHAR(50) NOT NULL,
    zip_code INTEGER NOT NULL
)

Identify the transitive dependency introduced by this table definition.

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Creating PostgreSQL Databases

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