If a database query returns all customer records where the 'city' field is either 'New York' OR 'Los Angeles', which set theory operation models this?

💡 Explanation

The query models a set union because it returns records belonging to either the set of customers from 'New York' or the set of customers from 'Los Angeles', therefore combining both sets. It's a union, rather than intersection which would only return customers in both cities.

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